Bunuel
Official Solution:
In reference to the current popularity of electronic mail, postal services frequently expressed anxiety that their prospects for remaining profitable are being limited by their antiquated business model.
A. In reference to the current popularity of electronic mail, postal services frequently expressed anxiety that
B. Referring to the current popularity of electronic mail, postal services frequently expressed anxiety about
C. When referring to the current popularity of electronic mail, postal services frequently express anxiety about
D. With reference to the current popularity of electronic mail, postal services frequently expressed anxiety about
E. Referring to the current popularity of electronic mail, postal services frequently express anxiety that
The original sentence has a verb tense problem. Expressed is in the past tense and are is in the present tense. The phrase current popularity in the first part of the sentence as well as the verb are in the non-underlined portion both suggest that we should change expressed to the present tense.
This eliminates choices A, B, and D. Choice C is incorrect because, although it fixes the tense problem, it also incorrectly employs the preposition about to introduce the noun clause describing the subject of the postal services' anxiety. Choice E properly uses that instead of about, and puts express in the present tense.
Answer: E
Hi Bunuel,
So whats the rule that we see here ?
Looking at C, does that mean , a preposition cannot introduce a noun clause, and that a Noun clause has to be introduced by a THAT ?
Thanks in advance !
Andy