1 . 人们参加俱乐部的原因有很多。(定语从句) (汉译英)

2 . Do you know the reason   ________he didn’t come?

A．that

B．which

C．for

D．why

3 . Is this the reason __________ he refused our help? (用适当的词填空)

4 . The constantly rising sea level is one of the reasons ________ we must take action to protect the environment. (用适当的词填空)

5 . There are many reasons________English is so widely used around the world. （用适当的词填空）

6 . John has been unwell, and this may be the reason ________ he lost the match. (用适当的词填空)

7 . The reason ________ I want to go abroad for study is to broaden my horizon. (用适当的词填空)

8 . Do you know the reason ________she got so angry yesterday? （用适当的词填空）

9 . I don’t know the reason ________ you quarreled with him. (用适当的词填空)

10 . 越来越多的人学习汉语的原因有很多。
There are many reasons___________.