Exercise1:
1)Many people began to wearing jeans because they were cheap.

=>Because of cheapness, many people began to wearing jeans....

2)Since he was careless,Tom lost the game.

=>Because of......Tom's carelessness, he lost the game........

3)Although she behaves well,no one loves her.

=>Despite....behaving well , no one loves her

4)Because of the cold weather,the crops are late this year.

=>Because ..the weather is cold......

5)Mary was worried because Tom was late.

=>Because of...Tom's lateness, mary was worried...

6)Tom walked slowly because his leg was bad.

=>Because of...Tom's bad leg, he walked slowly...

7)I came here because I want the English course.

=>Because of...wanting the English course, I came here...

8)I went to school although it was hot

=>Despite..the hot weather, I went to school....

9)Because of the dust in the room,I can't go in.

=>Because there is the dust in the room, I can't go in

10)Because of too much smoke,we have to wear masks.

=>Because......there is too much....

=>Because of cheapness, many people began to wearing jeans....

=>Because of......Tom's carelessness, he lost the game........

=>Despite....behaving well , no one loves her

=>Because ..the weather is cold......

=>Because of...Tom's lateness, mary was worried...

=>Because of...Tom's bad leg, he walked slowly..

=>Because of...wanting the English course, I came here...

>Despite..the hot weather, I went to school....

=>Because there is the dust in the room, I can't go in

=>Because......there is too much....