1 . The old man saw some Germans taking apart the Amber Room. My brother is talking to the old man. (用非限制性定语从句合并句子)

2 . The number of the people invited to the exhibition is over 200，a huge number of __________are students. (用适当的词填空)

3 . I met a group of foreigners yesterday,___ were from America.

A．whom

B．several of whom

C．several

D．several of them

4 . 语法填空
1. The humans are destroying nature day by day, __________ , of course, will cause severe punishment from it sooner or later.
2. They are in such a situation __________ everything is in disorder.
3. __________is known to all that China is the biggest developing country in the world.
4. Following the girl, we went into a hall, on__________ walls hung a few pictures of some famous scientists.
5. –It’s thirty years since we last met.
--But I still remember the story, believe it or not,__________we got lost on a rainy night.
6. We shouldn’t spend our money testing so many people, most of __________ are healthy.
7. Is oxygen the only gas __________ helps fire burn?
8. Many young people in the West are expected to leave __________ could be life’s most important decision—marriage—almost entirely up to luck.
9. The only question left is__________ often the workers are paid.
10. The last time we had great fun was __________we were visiting the Water Park.