單項(xiàng)選擇題

The captain is not on（）.

A.aboard
B.board
C.boarding
D.ashore

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單項(xiàng)選擇題

May I （）a look around your ship?

A.has
B.had
C.have
D.having

單項(xiàng)選擇題

It is very important for a sailor to （）a safety patrol.

A.has
B.had
C.have
D.having