Question

【题目】Even though we have made much progress in preventing pollution, yet much ________.

A. is remained to doB. remains being done

C. remains to be doneD. is remained to be done

Answer 1

【答案】C

【解析】

试题分析：句意：虽然在防治污染方面我们已经取得了很大进步，但依然还有许多要做。remain to do这里需要用它的被动式remain to be done，故选C。