1 . 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

2 . 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

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

A．of which	B．of them
C．of whom	D．of those

4 . I shall never forget the days _____ I spent with the Whites, _____ has a great effect on my life.

A．that; which	B．when; which
C．which; that	D．when; who

5 . I have bought two ballpens，________ writes well.

A．none of them	B．neither of them
C．neither of which	D．none of which