Of those fashionable coats , she chose________.
A. the less expensive
B. the one most expensive
C. the more expensive of them
D. the least expensive
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I can ______ than you.
A. no more play bridge
B. not more play bridge
C. not less play bridge
D. no less play bridge
"Martin was taking pictures of wild animals. "" Oh. no. He ____ killed ."
A. might be
B. might have been
Professor Wang ______ be in Beijing because I saw him in the library only a few minutes ago.
A. must not be
B. can't
C. may not
D. should not
" I know she was in because I heard her radio. but she didn't open the door.""She_______ the bell . "
A. mustn't have heard
B. may not have heard
C. needn't have heard
D. can't have heard