問題詳情

4. While ______ his mom fix dinner, Mark started to feel hungry.
(A) watching
(B) watched
(C) was watching
(D) he watches

參考答案

答案:A[無官方正解]
難度:簡單0.8125
統計:A(13),B(1),C(1),D(0),E(0)

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