21. He is busy _______ for the exam.
A. prepare B. to prepare
C. prepared D.preparing
20. They looked forward very much to ________ him again.
A. be meeting B. met
C. meeting D. meet
19. He enjoyed ________ the piano in the morning.
A. practising playing B. practising to play
C. to practise playing D. to practise to play
18. We mustn’t pretend _______ what we don’t know.
A. knowing B. having known
C. to know D. to be known
17. He likes _______ , but he doesn’t like ________ today because it is cold.
A. swimming, to swim B. to swim, swimming
C. to swim, to swim D. swimming, swimming
16. The report was so _______ that they were all ________ .
A. moving, moving B. moved, moved
C. moving, moved D. moved, moving
15. Don’t get ______ in the rain.
A. catch B. caught
C. to catch D. catching
14. He seemed ______ nothing to take home that morning.
A. have B. having
C. to have D. had
13. What I like most is _______ .
A. staying at home and doing nothing
B. staying at home and to do nothing
C. to stay at home and doing nothing
D. to stay at home and to do nothing
12. What I wanted was_______ as quickly as possible.
A. giving it up B. giving up it
C. to give up it D. to give it up