单项选择题

Spread a safety net（）the gangway.

A.on
B.over
C.by
D.under

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单项选择题

I shall （）the security patrol.

A.kept
B.keep
C.keeping
D.keeps

单项选择题

Where is the captain? -（）.

A. Follow me
B. He’s in his cabin
C. Yes, he is
D. No, he isn’t

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