急！！！英语题答案

看见某人做某事see sb. do sth.
看见某人正在做某事see sb. doing sth.
此处用后者，因为前面那个状语从句用的就是进行时，所以选D。没有see sb. be doing 这个用法。

see用法
vt.及物动词
1. 看见,看到[W][+(that)][+wh-][O3][O4][O7]
He was seen to come out.
有人看见他走出来。
We saw her chatting with her neighbors.
我们看到她在和邻居聊天。
I looked for Mike but couldn't see him in the crowd.
我找过麦克,但是在人群中看不到他。
2. 目睹;经历[W]
They have seen hard times.
他们经历过艰难时世。
3. 理解,领会;发现[W][+(that)][+wh-]
I see what you mean.
我理解你的意思。
4. 将...看作,认为[W][O][(+as)]
We see him as an authority on the subject.
我们把他看作为这方面的权威。
5. 想像,设想[W][(+as)][O4]
6. 察看,查看[+wh-]
Go and see if the car leaks oil.
去看看汽车是否漏油。
7. 注意;务必使...,保证[W][Y][+(that)]
See that the lights are turned off before you leave the office.
在离开办公室前务必把灯关了。
8. 会见,访问
9. 陪,送[O]
He saw me to the door and said goodbye.
他把我送到门口,说了声再见。
10. (时代、地方等)历经
Last year saw a slight increas