1 . Mary took a few friends to my birthday party, none of ________ I was familiar with. (用适当的词填空)

2 . Previously, water quality in the Li River had suffered greatly from an increasing volume of tourists, many of _________ frequently threw garbage into the river. (用适当的词填空)

3 . We said thanks to Mr. Wu, without ________we could’ t achieve our goals. （用适当的词填空）

4 . There are one hundred people in the museum, about one-third of ______ belong to one group. (所给词的适当形式填空)

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

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

7 . The children, all of ____________ had played the whole day long, were worn out.

8 . 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)

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

10 . I have two brothers, both of ________ (关系词) are doctors. （用适当的词填空）