單項(xiàng)選擇題

You must（）pilot ladder on port side.

A.rig
B.make
C.bring
D.put on

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Four years（）my ship called at this port.

A.before
B.after
C.ago
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單項(xiàng)選擇題

The man（）you saw yesterday is my Chief Officer.

A.who
B.whom
C.what
D.whose