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單項選擇題

It’s not advisable to cut（）the power supply.

A.out
B.off
C.down
D.away

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單項選擇題

It was demanded that the injured crewmembers（）at once.

A.was treated
B.would be treated
C.being treated
D.be treated

單項選擇題

It is NOT advisable to use nylon for alongside towing because it（）.

A.stretches too much
B.is too difficult to make fast
C.parts too readily
D.is too susceptible to mildew

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