1 . She brought her three friends to the party, none of ________I had ever met before. (用适当的词填空)

2 . He wrote many children’s books, nearly half of________ were published in the 1990s. （用适当的词填空）

3 . Tu Youyou was awarded the Nobel Prize, ________ is considered one of the highest international honours a person can receive.

A．that

B．what

C．which

D．where

4 . 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

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

A．them

B．who

C．whom

D．which

6 . The meeting, __________ was held in the park, was a great success. (用适当的词填空)

7 . 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

8 . Dr. Rowan, ______ secretary resigned two weeks ago, has had to do all his own typing.

A．whose

B．of whom

C．of which

D．which

9 . The company was willing to provide us with what we needed, ________ made us excited.

A．what

B．it

C．which

D．that

10 . The growing speed of a plant is influenced by a number of factors, _____ are beyond our control.

A．most of them

B．most of which

C．most of what

D．most of that