問題詳情

21. _____ a policeman isn’t easy and can be dangerous. People need to think seriously before they decidethey really want to be a police officer.
(A) X ; who
(B) Be; what
(C) Being; how
(D) Being; whether

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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