4, If she took exercise, she wouldn't be overweight

5, He wouldn't go to the class late if he had a bicycle

6, I could do homework if I were good at English

7, If he practised speaking French, he would speak French fluently, 

8, If it didn't snow heavily, the meeting wouldn't be cancelled

9, If it doesn't rain, I will go

10, If John didn't eat so many chips, he wouldn't be fat

9, B 

1, would type  2, knew 3, wouldn't make  4, were  5, had  6, would you visit  7, gave  8, would buy 

9, cleaned  10, won

1, If they were rich, they would help us

2, If he did his homework, he wouldn't be always punished

3, If he had enough time, he could help me