Question

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

1. A.
   lots of fish having been killed
2. B.
   kill lots of fish
3. C.
   lots of fish being killed
4. D.
   lots of fish to kill

Answer 1

C
试题分析：句意：大量的废物被倒入河中，大致了大量的鱼类死亡。Lead to导致，to为介词，介词后要接名词或动名词，因此排除B&D；而A是过去分词的完成时形式，完成时强调动作发生在主句动作之前，而题目里从句的动作（鱼被杀死）应该是在主句动作（垃圾被倒入河里）之后，所以A错误；故答案选C。
考点：考察介词后的动名词的复合结构。
点评：本题较难。要做出本题必须明白两个用法，一是to介词后要跟什么词来作它的宾语；而要明白having done所表示的时间，明白了这两个用法，问题就很简单了。
即学即练：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