If we ________ a table earlier, we wouldn't be standing here in a queue.
A. have booked B. booked
C. book D. had booked
I should not have laughed if I ________ you were serious.
A.thought B.would think
C.had thought D.have thought
He ________ sleep, although he tried to, when he got on such a hunt for an idea until he had caught it.
A. wouldn't B. shouldn't
C. couldn't D. mustn't
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
