19. The water in the river is very dirty because it________ heavily.(A) polluted (B) was polluting(C

問題詳情

19. The water in the river is very dirty because it________ heavily.
(A) polluted
(B) was polluting
(C) has polluted
(D) has been polluted

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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X(A)物質X匱乏時，冰棒即是美食☆ →...

上一篇 : 18. I have never been to Europe, and ________ .(A) so has Peter (B) neither has Peter(C) Peter does,
下一篇 : 20. Students, please read the sentences________ arewritten on the blackboard.(A) who (B) whose(C) wh