单项选择题

______ it was getting so late, we turned back.

A. As
B. Lest
C. So
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单项选择题
It is very cold today. You'd better put ______ your coat when you go out.
A. away
B. up
C. on
单项选择题
When his son came back, the old man ______.
A. was dead
B. died
C. had dead
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