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單項(xiàng)選擇題

When we arrived here yesterday, their ship （）for three days.

A.has left
B.had left
C.has been away
D.had been away

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單項(xiàng)選擇題

The accident resulted （） the motorman’s carelessness.

A.in
B.to
C.from
D.by

單項(xiàng)選擇題

The second engineer seemed to know what the sign （）.

A.stand by
B.stand for
C.stood by
D.stood for

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