When I was a child, I ________ watch TV whenever I wanted to.
A. should B. could
C. must D. need
Since nobody gave him any help, he ________ have done the research on his own.
A. can B. must
C. would D. need
—What are you doing this Saturday?
—I'm not sure, but I ________ go to the Rolling Stones concert.
A．must B．would
C．should D．might
—It rained cats and dogs this morning.I'm glad we took an umbrella.
—Yeah, we would have got wet all over if we ________.
A．hadn't B．haven't
C．didn't D．don't
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
They were abroad during the months when we were carrying out the investigation, or they _____ toour help.
A. would have come B. could come
C. have come D. had come
