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單項(xiàng)選擇題

Is extra power available（）emergency while maneuvering?

A.for
B.in
C.during
D.to

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單項(xiàng)選擇題

A man aboard a vessel，signaling by raising and lowering his outstretched arms to each side，is indicating（）.

A.danger，stay away
B.all is clear，it is safe to pass
C.the vessel is anchored
D.a distress signal

單項(xiàng)選擇題

You are（）danger.

A.run in
B.running into
C.run into
D.running in