問題詳情

(  )9.Mr. Liu ________ very fat, but now he does a lot of exercise and becomes thin(瘦的).
(A) use to 
(B) is 
(C) used to 
(D) used to be

參考答案

答案:D
難度:適中0.591304
統計:A(9),B(12),C(25),D(68),E(0)

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