1 . 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

2 . It is reported that two schools,　　1　　are being built in my hometown,will open next year.

A．they both

B．which both

C．both of them

D．both of which

3 . Many young people, most of ________ were well-educated, headed for remote regions to chase their dreams.

A．which

B．them

C．who

D．whom

4 . 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

5 . The old man has two sons, _________ are working in the supermarket.

A．both of whom

B．each of them

C．both of them

D．all of whom

6 . He paid the boy $10 for washing ten windows; most of ________ hadn’t been cleaned for ten years.

A．these

B．those

C．that

D．which

7 . She brought with her three friends，none of ________ I had ever met before.

A．them

B．who

C．whom

D．these

8 . Last week, only two people came to look at the house, ________ wanted to buy it.

A．none of them

B．both of them

C．none of whom

D．neither of whom

9 . For medium-sized cities in China, there is much room to spread out further, ________ Yancheng is an example.

A．for which

B．in which

C．of which

D．from which

10 . There are three libraries in our school, ________ were built five years ago.

A．all of them

B．either of them

C．all of which

D．both of that