1 . He has two sons, both of ________ are staying abroad. (用适当的词填空)

2 . The foreign guests, most of________ were government officials, were warmly welcomed at the airport. (用适当的词填空)

3 . There are about 100 teachers, two-thirds of______are women. (用适当的单词填空)

4 . Last week, only two people climbed to the top of the mountain, neither of __________ came from Europe. （用适当的词填空）

5 . The medicine was tested on malaria patients, most of ___________ recovered.（用适当的单词填空）

6 . We have three foreign teachers, two of __________ are from Canada.

A．that

B．whom

C．them

D．who

7 . The university has a few dozen lecturers, all of __________ have graduated from top-class universities. (用适当的词填空)

8 . I was told that there were about 50 foreign students________ Chinese in the school, most _______ were from Germany.

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

9 . At a group wedding ceremony this Sunday I saw many newly-married couples, all of ______ were wearing a big smile on the face.

A．those

B．them

C．whom

D．which

10 . The old man has two sons, ______ are lawyers.

A．both of them

B．both of who

C．both of whom

D．both of they