12. What ___ your parents doing at that time?(A) is (B) are (C) was (D) were

問題詳情

12. What ___ your parents doing at that time?
(A) is
(B) are
(C) was
(D) were

參考答案

答案：D
難度：計算中-1
書單：沒有書單，新增

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