We’ll have to take the machine apart to

admin2022-08-02  9

问题 We’ll have to take the machine apart to put it right.A.had leakedB.leakedC.is leakingD.has been leaking

选项 A.had leaked
B.leaked
C.is leaking
D.has been leaking

答案 D

解析 现在完成进行时表动作已经持续了一段时间并且还在进行,与for some time相对应。
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