17._____these pictures,I couldn’t help thinking of those days when I was in Beijng.
A. looking at
B. looked at
C. to be looking at
D. to look at
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16. The number of people _____ fifty, but many of them absent for different reasons.
A. were, was
B. was, was
C. was, were
D. were, were
15. She knows some of the people have died from the accident.
A. where
B. which
C. who
D. whom
14. my opinion, the essay is supposed to be handed in tomorrow.
A. from
B. in
C. on
D. to
13. It is better the door than to leave it open.
A. shut
B. to shut
C. to be shut
D. shutting
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