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單項選擇題

The expression STAND-BY ENGINE means:（）.

A.to get the engine ready
B.to respond to the engine
C.to maneuver the engine
D.to change the engine

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單項選擇題

Some goods are missing（）terrible weather.

A.due
B.because of
C.because
D.since

單項選擇題

Should that kind of weather（），the two ships would touch each other.

A.persist
B.persists
C.to persist
D.persisted