1 . This gift was the Amber Room, ________ was given this name because several tons of amber were used to make it.

A．that

B．which

C．why

D．what

2 . 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

3 . She brought her three friends to the party, none of ________ I had ever met before.

A．them

B．who

C．whom

D．which

4 . More and more people are learning English,____ has drawn much attention of the public.

A．the importance	B．the important
C．the importance of which	D．the importance of it

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

A．that

B．this

C．which

D．it