問題詳情

22. The ground is all wet. It _____ not long ago.
(A) must rain
(B) must rained
(C) must be rained
(D) must have rained

參考答案

答案:D
難度:適中0.567
書單:沒有書單,新增

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22. The ground is all wet. It _____ not long ago.