1 . I’m a scientist ________ studies animals such as apes and monkeys. （用适当的词填空）

2 . No matter ________ you say, I won’t believe you anymore. （用适当的词填空）

3 . He had a thick moustache and long white hair, _______ sometimes stood on end as though he had just received an electric shock. (用适当的词填空)

4 . The first thing ________ should be done is to work out a plan. （用适当的词填空）

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

6 . _________________ the earth goes around the sun is a fact known to all. （用适当的词填空）

7 . Always try everything even if it (turn) out to be useless. (所给词的适当形式填空)

8 . He’s got himself in a dangerous situation ______ he is likely to lose control over the plane.

A．when

B．that

C．which

D．where

9 . ________ (既然) you want to improve your oral English, why not practise speaking English every day? (根据汉语提示完成句子)