The children, ________ had played the whole day long, were worn out.
A. all of what B. all of which C. all of them D. all of whom
We are confident that the environment ________ by our further efforts to reduce pollution.
A. improves B. will be improved C. has improved D. was improved
— Where did you find the professor who made the speech yesterday?
— It was in the hall_______ the students often have a meeting.
A. where B. which C. that D. when
When I first met Mary I didn’t like her, but I ________ my mind.
A. have changed B. change C. had changed D. would change
I ________ myself more— it was a perfect day.
A. shouldn’t have enjoyed B. needn’t have enjoyed
C. wouldn’t have enjoyed D. couldn’t have enjoyed
_______ at the cafeteria before, Tina didn’t want to eat there again.
A. Having eaten B. To eat C. Eat D. Eating
