1 . There are several teachers standing at the school gate, one of ________ is my English teacher. (用适当词填空)

2 . 以往，漓江的水质因游客量的增长遭到了严重破坏，很多游客经常将垃圾扔入江中。
Previously, water quality in the Li River suffered greatly from an increasing volume of tourists, ______________.

3 . I encountered an old friend from ______ I had parted for many years. (所给词的适当形式填空)

4 . The patient may have seen many skilled specialists, none of __________ can cure him of the rare disease. （用适当的词填空）

6 . That is ______ many experts (专家) are worrying about.

A．what

B．why

C．whom

D．which

7 . He is not the best candidate for the position.So the problem is ________we can get to replace him.（用适当的词填空）

8 . He invited many people to his wedding, most of_________________ were absent for different reasons. （用适当的词填空）

9 . They thanked Tom, without               they wouldn’t have succeeded.

A．which

B．them

C．whom

D．who