题目内容

I have to walk upstairs. The lift        down.
A．was breakingB．brokeC．will breakD．has broken
D
考查时态,句意:我必须去楼上.电梯已经坏了.结合语境可知下文描述的是现在已经完成的动作,故用现在完成时态,选D.
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