1 . I was told that there were about 50 foreign students         Chinese in the school, most        were from Germany.

A．studying; of whom	B．study; of whom
C．studying; of them	D．study; of them

2 . ________ is known to us, there is a close connection between smog and pollution.

A．It

B．Which

C．There

D．As

3 . She came with her three friends, none of ______ I have ever met before.

A．them

B．those

C．who

D．whom

4 . There are many different groups of people around the world, __________live happily in the absence of new technology.

A．that

B．who

C．which

D．where

5 . The latest weather-tracking computer programmes give people lots of warnings about potential natural disasters, __________ saves many lives.

A．that

B．which

C．who

D．whom

7 . The sun heats the earth, _______________ is very important to living things.

A．what

B．why

C．that

D．which

8 . In our class, there are 46 students, ________half come from the countryside.

A．of whom

B．who

C．of them

D．which

9 . These articles are written in simple language, _____ makes it easy to read.

A．that

B．this

C．which

D．it

10 . _____ we all know, the Amber Room was missing.

A．As

B．It

C．Which

D．That