28. ________ the vet was checking the dog, her smartphone rang.(A) After (B) If (C) While (D) before

問題詳情

28. ________ the vet was checking the dog, her smartphone rang.
(A) After
(B) If
(C) While
(D) before

參考答案

答案：C
難度：計算中-1
書單：沒有書單，新增

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