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單項(xiàng)選擇題

I broke my leg when I（）skiing in America.

A.is
B.was
C.–（不填）
D.would be

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單項(xiàng)選擇題

The road （）built last year.

A.has been
B.has being built
C.is being
D.was

單項(xiàng)選擇題

When was the building（）?

A.complete
B.completing
C.completed
D.completes

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