問題詳情

14. The river ________ heavily was very clean twenty years ago.
(A) which was polluted
(B) that polluted
(C) who was polluting
(D) has polluted

參考答案

答案:A
難度:計算中-1
書單:沒有書單,新增

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X(A)物質X匱乏時,冰棒即是美食☆ →...