1 . ________ everyone tries to sort garbage(分类垃圾） like people in Shanghai, our environment will become much better.

A．As

B．If

C．Because

D．Since

2 . I will be very happy ________ you come to my party.

A．if

B．though

C．or

D．and

3 . If you don’t work hard, you will f________ the exam.

4 . You made the same mistake again. You won’t get better ________ you don’t learn from your lesson.

A．so

B．though

C．if

D．until

5 . She   ________(not speak) to you if you don’t speak to her first.

6 . — What do you think of the book I gave you?
—I will tell you if I ________ reading it.

7 . If the train ________ the boy, he will die.

A．will travel over

B．travels over

C．travelled over

D．travelling over

8 . 如果你在比赛中得了第一名，今年夏天我就带你去度假。
________ you get the first place in the race, I will take you to ________ ________ ________ in summer.