1 . 以往，漓江的水质因游客量的增长遭到了严重破坏，很多游客经常将垃圾扔入江中。
Previously, water quality in the Li River suffered greatly from an increasing volume of tourists, ______________.

4 . Her sister, ________ you met at my home, was a teacher of English. (用适当的词填空)

5 . Our class consists of 52 students, most of________are friendly and hardworking. （用适当的词填空）

6 . He has two sons,         work as chemists.

A．both of which	B．both of whom
C．both of who	D．both of them

7 . I was told that there were about 50 foreign students         Chinese in the school, most        were from Germany.

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

8 . Her sister, ________ you met at my home, was a teacher of English.

A．whom

B．that

C．which.

D．what

9 . The soldiers were tired and hungry, most of _____ had marched for a long time. (用适当的词填空)

10 . 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)