21. Who taught you ______ a bus.
A. driving  B. to drive C. riding D. to ride
22. It’s necessary ________the book at once.
A. for him to return  B. to him return
C. at him to return  D. to him to return
23. We find it difficult _______ the work in two hours.
A. finishing  B. to finish  C. finish D. finished
24. Would you please _______ the text ?
A. read  B. to read C. reading  D. is reading
25. After singing a song , Mary ______ us a story.
A. went on telling  B. went on to tell
C. went telling  D. went to tell
26. It’s very kind _______ to see me.
A. that you come  B. that you will come
C. for you to come  D. of you to come
27. --- Mum, the Chinese medicine tastes so ______ that I don’t want to take it.
      --- But, dear, it is good for you.
    A. good  B. terribly  C. terrible  D. well
28. --- I think we should keep _______ in the reading-room.
      --- You are right.
    A. quiet B. quietly   C. quite  D. quickly
29. --- How was the old woman this morning?
      --- She looked _______.
    A. be happy  B. happily C. happy D. to be happily
30. Travelling by train is _______ cheaper and _______ enjoyable than by air.
    A. more; much more   B. quite; much too  
    C. very; very much   D. much; far more