The policeman asked him some questions. He remained ______. (silent, silently)
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These questions ______ in English.
A. answer
B. must answer
C. must be answered
D. can answer
I began to grow ______, sitting there doing nothing. (cold, coldly)
It is most important that I ______ (would, should) go home immediately.
Father ______ run fast when he was young.
A. would
B. might
C. should
D. could