1 . Mary took a few friends to my birthday party, none of ________ I was familiar with. (用适当的词填空)

2 . More than 20 people have traveled to the moon, 12 of __________have walked on the moon.(用适当的词填空)

3 . There are 400 workers in the factory, most of _________ are women.

A．who

B．whom

C．them

D．whose

4 . Bill Gates, for ________ money isn't a problem, still lives a very simple life now. (用适当的词填空)

5 . 下列各句均有一处错误，请指出并改正。
1. On such a cold day, people prefer to stay at home rather than to go out.
2. I never heard from him ever since he left.
3. The young man insisted being sent to the front, which moved all the people present.
4. On hearing the news, Mary burst into a laughter.
5. The soldiers were sent to the earthquake-hit area immediately to save the people trapping in the ruins.
6. The great number of children whose parents had died in the earthquake were sent to other cities.
7. I devote part of my spare time to play the violin every day.
8. Only when the war was over the young soldier return to his hometown.
9. It’s such a lovely cup that both my sister and I liked it for the first time we saw it.
10. Your speech was heard by a group of five judges, all of who thought highly of your performance.

6 . We shouldn’t spend our money testing so many people, most of ________ are healthy.

A．that	B．which
C．what	D．whom