问题

The fire _______ before the fire-fightersarrived.

A:has been put out
B:was put out
C:had put out
D:had been put out

正确答案是：

同类题型

I could just see a car in the distance, but I couldn’t _____ what color it was.

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Yang Liwei was a student at this flight school from 1983 to 1987, he studied very hard and was made chairman of the Students’ Union.

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