Mr. Bob, ______ as a manager for many years, found it hard to be an ordinary clerk again.
A. having worked B. worked C. to have worked D. working
How frequently _______, the works of Shakespeare always attract many people.
A. performed B. performing C. being performed D. to be performed
The topic___________ a heated discussion.
A. set off B. set out C. set down D. set for
The car ran into a crowd of middle school students, ______to hospital immediately.
A. two of whom sent B. two of them sent
C. two of whom are sent D. two of them sending
I think I'll have a cold drink __________ coffee.
A. other than B. any other C. rather than D. better than
Should another world war break out, what would _________ human beings?
A. happen B. become C. become of D. happen as
