1 . In their class there are altogether 54 students, half of ________ wear glasses. （用适当的词填空）

3 . In our class there were 42 students, nearly 80% of ________ wear glasses. (用适当的词填空)

4 . The nursing home, located on a housing estate, has more than 150 senior citizens, some of __________ are over 90 years old. (用适当的词填空)

5 . The shopkeeper, from ________ the bread was stolen, refused to drop the charges. （用适当的词填空）

6 . The medical team is made up of ten people, eight of______ are experienced nurses. (用适当的词填空)

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

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

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

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