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單項選擇題

It（）aroundsixo’clockwhenIdrovebackyesterdaybecauseitwasalreadydark.

A.must have been
B.must he
C.was to be
D.had to be

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單項選擇題

（），there was no hope of her getting the order.

A.As she was exhausted
B.If she was exhausted
C.Exhausted though she was
D.Now that she was exhausted

單項選擇題

As for the influence of Internet，nowhere（）the results more clearly than in the US.

A.we have seen
B.we had seen
C.seen we have
D.have we seen