阿摩線上測驗
22. The ground is all wet. It _____ not long ago.
(A) must rain
(B) must rained
(C) must be rained
(D) must have rained
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統計： A(40), B(66), C(51), D(186), E(0) #3156191
統計： A(40), B(66), C(51), D(186), E(0) #3156191
