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# Since 2005, a 50-acre chunk of hillside — almost eight million cubic

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Math Expert
Joined: 02 Sep 2009
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Since 2005, a 50-acre chunk of hillside — almost eight million cubic  [#permalink]

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24 May 2018, 22:15
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15% (low)

Question Stats:

77% (01:14) correct 23% (01:35) wrong based on 260 sessions

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Since 2005, a 50-acre chunk of hillside — almost eight million cubic yards of rock, enough to fill 60 football stadiums to the top of the bleachers, eight stories up — had been sliding slowly downhill in the one of the canyons outside Malibu; if and when it will stop remains unclear to geologists.

A. rock, enough to fill 60 football stadiums to the top of the bleachers, eight stories up — had been sliding

B. rock, which is enough to fill 60 football stadiums to the top of the bleachers and eight stories up — had been sliding

C. rock, an amount that is enough to fill 60 football stadiums to the top of the bleachers, which is eight stories up — had been sliding

D. rock, enough to fill 60 football stadiums to the top of the bleachers, eight stories up — has been sliding

E. rock, an amount that is enough to fill 60 football stadiums to the top of the bleachers, which is eight stories up — slid

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Re: Since 2005, a 50-acre chunk of hillside — almost eight million cubic  [#permalink]

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26 May 2018, 09:24
1
Bunuel wrote:
Since 2005, a 50-acre chunk of hillside — almost eight million cubic yards of rock, enough to fill 60 football stadiums to the top of the bleachers, eight stories up — had been sliding slowly downhill in the one of the canyons outside Malibu; if and when it will stop remains unclear to geologists.

A. rock, enough to fill 60 football stadiums to the top of the bleachers, eight stories up — had been sliding

B. rock, which is enough to fill 60 football stadiums to the top of the bleachers and eight stories up — had been sliding

C. rock, an amount that is enough to fill 60 football stadiums to the top of the bleachers, which is eight stories up — had been sliding

D. rock, enough to fill 60 football stadiums to the top of the bleachers, eight stories up — has been sliding

E. rock, an amount that is enough to fill 60 football stadiums to the top of the bleachers, which is eight stories up — slid

VERITAS PREP OFFICIAL SOLUTION:

This sentence contains an unusually structured element within the dashes that can easily distract you from what really matters in getting the problem correct: tense. A close look at the answer choices shows the important decision point between “had been sliding,” “has been sliding,” and “slid.” When “since” is used in a sentence, it generally must be linked with the present perfect tense.

For instance, it is always incorrect to say, “Since 2005, John lived in California” and it is incorrect to say, “Since 2005, John had lived in California” unless you know that the action stopped at some point in the past. This sentence begins with “Since 2005...” and it is clear from the independent clause after the semi-colon that the action continues into the present.

As a result, only (D) can be correct as the past perfect “had been sliding” in (A), (B), and (C) and the simple past “slid” in (E) all create illogical timelines (the action did not stop at some point in the past). While the correct answer uses several appositive phrases to create an unusual structure between the dashes, it is the only one with the correct tense, so you should not spend time considering the other differences. Correct answer is (D).
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Re: Since 2005, a 50-acre chunk of hillside — almost eight million cubic  [#permalink]

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14 Nov 2018, 13:41
1
Bunuel wrote:
Since 2005, a 50-acre chunk of hillside — almost eight million cubic yards of rock, enough to fill 60 football stadiums to the top of the bleachers, eight stories up — had been sliding slowly downhill in the one of the canyons outside Malibu; if and when it will stop remains unclear to geologists.

A. rock, enough to fill 60 football stadiums to the top of the bleachers, eight stories up — had been sliding

B. rock, which is enough to fill 60 football stadiums to the top of the bleachers and eight stories up — had been sliding

C. rock, an amount that is enough to fill 60 football stadiums to the top of the bleachers, which is eight stories up — had been sliding

D. rock, enough to fill 60 football stadiums to the top of the bleachers, eight stories up — has been sliding

E. rock, an amount that is enough to fill 60 football stadiums to the top of the bleachers, which is eight stories up — slid

Dear Moderator,
Can we tag this question as Verb/tense form instead of, subject - verb agreement . Doesn't seem as though Subject -verb agreement is being tested here. Hope you will look into this. Thank you.
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Re: Since 2005, a 50-acre chunk of hillside — almost eight million cubic  [#permalink]

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24 May 2018, 22:26
1
Since 2005, a 50-acre chunk of hillside — almost eight million cubic yards of rock, enough to fill 60 football stadiums to the top of the bleachers, eight stories up — had been sliding slowly downhill in the one of the canyons outside Malibu; if and when it will stop remains unclear to geologists.

A. rock, enough to fill 60 football stadiums to the top of the bleachers, eight stories up — had been sliding - Tense error. We need 'has been sliding' here.

B. rock, which is enough to fill 60 football stadiums to the top of the bleachers and eight stories up — had been sliding - Same as A

C. rock, an amount that is enough to fill 60 football stadiums to the top of the bleachers, which is eight stories up — had been sliding - Same as A

D. rock, enough to fill 60 football stadiums to the top of the bleachers, eight stories up — has been sliding - Correct.

E. rock, an amount that is enough to fill 60 football stadiums to the top of the bleachers, which is eight stories up — slid - Repeats the tense error by using past tense.

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Re: Since 2005, a 50-acre chunk of hillside — almost eight million cubic  [#permalink]

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25 May 2018, 04:01
IMO D.

Only option that uses present perfect tense to show the effect of 'since'.
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Re: Since 2005, a 50-acre chunk of hillside — almost eight million cubic  [#permalink]

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25 May 2018, 05:22
Since 2005, a 50-acre chunk of hillside — almost eight million cubic yards of rock, enough to fill 60 football stadiums to the top of the bleachers, eight stories up — had been sliding slowly downhill in the one of the canyons outside Malibu; if and when it will stop remains unclear to geologists.

A. rock, enough to fill 60 football stadiums to the top of the bleachers, eight stories up — had been sliding

B. rock, which is enough to fill 60 football stadiums to the top of the bleachers and eight stories up — had been sliding

C. rock, an amount that is enough to fill 60 football stadiums to the top of the bleachers, which is eight stories up — had been sliding

D. rock, enough to fill 60 football stadiums to the top of the bleachers, eight stories up — has been sliding - correct tense

E. rock, an amount that is enough to fill 60 football stadiums to the top of the bleachers, which is eight stories up — slid
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Since 2005, a 50-acre chunk of hillside — almost eight million cubic  [#permalink]

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25 May 2018, 07:09
One easy way to anwser this question is to think that on GMAT "Since" requires present perfect and the only option that has it is D.
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Re: Since 2005, a 50-acre chunk of hillside — almost eight million cubic  [#permalink]

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25 May 2018, 11:10
Bunuel wrote:
Since 2005, a 50-acre chunk of hillside — almost eight million cubic yards of rock, enough to fill 60 football stadiums to the top of the bleachers, eight stories up — had been sliding slowly downhill in the one of the canyons outside Malibu; if and when it will stop remains unclear to geologists.

A. rock, enough to fill 60 football stadiums to the top of the bleachers, eight stories up — had been sliding

B. rock, which is enough to fill 60 football stadiums to the top of the bleachers and eight stories up — had been sliding

C. rock, an amount that is enough to fill 60 football stadiums to the top of the bleachers, which is eight stories up — had been sliding

D. rock, enough to fill 60 football stadiums to the top of the bleachers, eight stories up — has been sliding

E. rock, an amount that is enough to fill 60 football stadiums to the top of the bleachers, which is eight stories up — slid

Correct Answer must be (D) errors in other options, highlighted in RED.

Since 2005, a 50-acre chunk of hillside — almost eight million cubic yards of rock, enough to fill 60 football stadiums to the top of the bleachers, eight stories up — has been sliding slowly downhill in the one of the canyons outside Malibu; if and when it will stop remains unclear to geologists.
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Re: Since 2005, a 50-acre chunk of hillside — almost eight million cubic  [#permalink]

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15 Nov 2018, 02:07
stne wrote:
Bunuel wrote:
Since 2005, a 50-acre chunk of hillside — almost eight million cubic yards of rock, enough to fill 60 football stadiums to the top of the bleachers, eight stories up — had been sliding slowly downhill in the one of the canyons outside Malibu; if and when it will stop remains unclear to geologists.

A. rock, enough to fill 60 football stadiums to the top of the bleachers, eight stories up — had been sliding

B. rock, which is enough to fill 60 football stadiums to the top of the bleachers and eight stories up — had been sliding

C. rock, an amount that is enough to fill 60 football stadiums to the top of the bleachers, which is eight stories up — had been sliding

D. rock, enough to fill 60 football stadiums to the top of the bleachers, eight stories up — has been sliding

E. rock, an amount that is enough to fill 60 football stadiums to the top of the bleachers, which is eight stories up — slid

Dear Moderator,
Can we tag this question as Verb/tense form instead of, subject - verb agreement . Doesn't seem as though Subject -verb agreement is being tested here. Hope you will look into this. Thank you.

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Edited the tags. Thank you.
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Re: Since 2005, a 50-acre chunk of hillside — almost eight million cubic  [#permalink]

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15 Nov 2018, 04:38
Bunuel wrote:
Since 2005, a 50-acre chunk of hillside — almost eight million cubic yards of rock, enough to fill 60 football stadiums to the top of the bleachers, eight stories up — had been sliding slowly downhill in the one of the canyons outside Malibu; if and when it will stop remains unclear to geologists.

A. rock, enough to fill 60 football stadiums to the top of the bleachers, eight stories up — had been sliding

B. rock, which is enough to fill 60 football stadiums to the top of the bleachers and eight stories up — had been sliding

C. rock, an amount that is enough to fill 60 football stadiums to the top of the bleachers, which is eight stories up — had been sliding

D. rock, enough to fill 60 football stadiums to the top of the bleachers, eight stories up — has been sliding

E. rock, an amount that is enough to fill 60 football stadiums to the top of the bleachers, which is eight stories up — slid

Seeing the sentence it seems to be an activity is still continuing, so we need to be sure of the tense, option D provides correct tense of has been sliding
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Re: Since 2005, a 50-acre chunk of hillside — almost eight million cubic  [#permalink]

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15 Nov 2018, 06:13

"Since" when used to refer time, then sentence takes present perfect verb.

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Re: Since 2005, a 50-acre chunk of hillside — almost eight million cubic  [#permalink]

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20 Feb 2019, 03:07
Per the meaning of the sentence, the geologists are unclear as to when the sliding of the rocks will stop. This fact is stated in simple present tense. This means that the fact about geologists is relevant in present and the sliding of the rocks, which started in past, is still continuing in the present. Hence, had been sliding (Past Perfect) should be replaced with has been sliding (Present Perfect tense).

Re: Since 2005, a 50-acre chunk of hillside — almost eight million cubic   [#permalink] 20 Feb 2019, 03:07
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