Question

Lots of waste has been dumped into the river，which has led to________.

A．lots of fish having been killed	B．kill lots of fish
C．lots of fish being killed	D．lots of fish to kill

Answer 1

C

試題分析：句意：大量的廢物被倒入河中，大致了大量的魚類死亡。Lead to導致，to為介詞，介詞后要接名詞或動名詞，因此排除B&D；而A是過去分詞的完成時形式，完成時強調動作發生在主句動作之前，而題目里從句的動作（魚被殺死）應該是在主句動作（垃圾被倒入河里）之后，所以A錯誤；故答案選C。
點評：本題較難。要做出本題必須明白兩個用法，一是to介詞后要跟什么詞來作它的賓語；而要明白having done所表示的時間，明白了這兩個用法，問題就很簡單了。
即學即練：I’d appreciate it if you could come and help me once more and I am always thankful for ___________ me with my English in the past.
A. you to help   B. yours helping   C. you having help   D. your helping