31、It isn't quite ( ) that he will be present at the meeting.
A. certain
B. sure
C. right
D. exact
32、He told her nothing， ( ) upset her.
A. that
B. for which
C. about which
D. which
33、It's too expensive for me. I can't ( ) it.
A. spend
B. cost
C. pay
D. afford
34、Would you like me ( ) the radio a bit?
A. turning down
B. to turn down
C. turn down
D. turned down
35、"I saw Mary in the library yesterday." "You ( ) her， she is still in hospital."
A. mustn't have seen
B. could not see
C. can't have seen
D. must not see
36、It was difficult for him to buy good shoes because he had such a big ( ) of feet.
A. pair
B. size
C. couple
D. number
37、Jack works so hard as he dreams ( ) owning his own house soon.
A. to
B. with
C. of
D. on
38、There are about 70 people ( ) in the accident.
A. were killed
B. who killed
C. killing
D. killed
39、I suppose I can count ( ) you for help in this matter.
A. of
B. on
C. at
D. to
40、Watch your step， ( ) you might fall into the water.
A. or
B. and
C. unless
D. but
