Had the governments and scientists not worked together , AIDS-related deaths _______ since their highest in 2005.
A. had not fallen B. would not fall
C. did not fall D. would not have fallen
When the time came to make the final decision for a course , I decided to apply for the one that ______my interest.
A. limited B. reserved
C. reflected D. spoiled
A sudden stop can be a very frightening experience , ______ if you are travelling at high speed.
A. eventually B. strangely
C. merely D. especially
When their children lived far away from them , these old people felt ______from the world.
A. carried away B. broken down
C. cut off D. brought up
Scientists have advanced many theories about why human beings cry tears , none of ______ has been proved.
A. whom B. which C. what D. that
To return to the problem of water pollution , I'd like you to look at a study _______ in Australia in 2012.
A. having conducted B. to be conducted
C. conducting D. conducted
