Question

【題目】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】

試題分析：句意：雖然在防治污染方面我們已經(jīng)取得了很大進(jìn)步，但依然還有許多要做。remain to do這里需要用它的被動(dòng)式remain to be done，故選C。