sausha80 wrote:
Although it is conceivable that certain electronic devices implanted in the brain may someday correct blindness caused by nerve damage, there is now no clear evidence of their ability to do it.
a) of their ability to do it
[strike]b) of their doing that[/strike]
c) that they can do so
d) that they might one day be able to do it
e) to do so
I selected (b) but it seems the correct answer is (c). Can somebody please help me understand why (c) is correct and why others are wrong?
Thanks.
Q.Although it is conceivable that certain electronic devices implanted in the brain may some day correct blindness ...... there is now no clear evidence...
We need a 'that' at the end of evidence to introduce the clause that will follow, leaving us with c and d. C is correct
looking at b. Although it is conceivable that certain electronic devices implanted in the brain may some day correct blindness... there is now no clear evidence
of their doing thatby adding 'doing' we are changing the tense and the meaning. The sentence means to say that there is no evidence that X can cure Y. Answer B says that there is no evidence that they are curing y right now. (it is also a bit wordy)
hope that is clear.