1 . She has three sons, all of __________ are abroad now. (用适当的词填空)

2 . The employer, ______ all the employees respect, is concerned about his employees’ working conditions. （用适当的单词填空）

3 . The students, all of ______ had played the whole day long, were worn out. (单词的适当形式填空)

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

A．both of them

B．both of who

C．both of whom

D．both of they

5 . The course normally attracts about 100 students per year, up to half will be from abroad.

A．who	B．of which
C．when	D．of whom

6 . The parents are making changes to their previous education methods, of ______ negative effect they begin to be aware.

A．who

B．whom

C．whose

D．which

7 . Look, a group of students are playing the violin there, ____their teacher as the conductor.

A．in front of them stand	B．in front of them stands
C．in front of whom standing	D．in front of whom stands

8 . 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

9 . John invited about 40 people to his wedding, most of 　　　 are family members.

A．them	B．that
C．which	D．whom

10 . The settlement is home to nearly l, 000 people, many of ________ left their village homes for a better life in the city.

A．whom

B．which

C．them

D．those