1 . There are more than 4,000 students in our school, the majority of   ________ put their hearts into their studies. (用适当的词填空)

2 . 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, ______________.

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

4 . ______ is known to all is that the old scientist, ______ Chinese people are proud of, is still devoted to advancing the medical development.

A．As; whom

B．What; whose

C．It; whose

D．What; whom

7 . More than 20 people have traveled to the moon, 12 of __________have walked on the moon.(用适当的词填空)

8 . I have two sisters. Both of them are doctors. （用定语从句合并句子）
_______________________________________________________________________________________________

9 . I came across my primary school teacher this morning, with________ I have lost touch for almost 20 years. （用适当的词填空）

10 . He was eager to go to the hospital to see his stepmother, ________he loved and respected as his own mother. （用适当的词填空）