I have to walk upstairs. The lift        down.
A．was breakingB．brokeC．will breakD．has broken
D
考查時(shí)態(tài),句意:我必須去樓上.電梯已經(jīng)壞了.結(jié)合語境可知下文描述的是現(xiàn)在已經(jīng)完成的動作,故用現(xiàn)在完成時(shí)態(tài),選D.
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