He didn’t explain _______ why he was late, which made us unhappy.
A. of us B. us C. for us D. to us
Don’t spoil (惯坏) the child. Can’t you make your little son ______ himself?
A. behave B. believe C. perform D. conduct
It is well known that Madam Curie won two Nobel Prizes for her scientific ______.
A. adventures B. inspiration C. achievements D. discoveries
—Would you like to watch the basketball match with me this evening?
—______. I like basketball very much.
A. I’d love to B. Not really
C. I wouldn’t go D. Thank you all the same
Missing the train means _____ for another two hours.
A. to wait B. waiting C. having waited D. waits
Most students find _____ hard to learn maths well.
A. that B. this C. it D. very
