1 . The science of medicine, in_______ progress has been very rapid, is perhaps the most important of all the science.

2 . When changing lanes, a driver should use his turning signal to let other drivers know _____ lane he is entering. (用适当的词填空)

3 . The clever boy made a hole in the wall, ________ he could see ________ was going on inside the house.

A．which; what	B．through which; what
C．through that; what	D．which; that

4 . We are living in an age ________ online shopping is part of our daily life.

A．that

B．when

C．where

D．which

5 . The student will never forget those days ________ several soldiers took turns to look after him after the earthquake.

A．that

B．which

C．when

D．where

6 . The factory produces half a million pairs of shoes every year, 80%_________are sold abroad.

A．of which

B．which of

C．of them

D．of that

7 . More and more animals have been hunted, some of ____________ are dying out.

8 . Robinson Crusoe reached a lonely island . He stayed on the island for 22 years. （合并成含有非限制性定语从句的句子）
__________________________________________________________.

9 . 我不喜欢你跟我说话的方式。(用上定语从句)

10 . ---Do you know the girl over there?
---Yes, she is Mary, ______ sister I shared a room with when I was in Junior High.

A．that

B．of which

C．whose

D．which