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

$\Longrightarrow$ Because of cheap price, many people began to wearing jeans

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

$\Longrightarrow$ Because of Tom's carelessness, he lost the game.

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

$\Longrightarrow$ Despite good behavior, no one loves her.

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

$\Longrightarrow$ Because it's cold weather, the crops are late this year.

5) Mary was worried because Tom was late.

$\Longrightarrow$ Because of Tom's lateness, Marry was worried.

6) Tom walked slowly because his leg was bad.

$\Longrightarrow$ Because of Tom's bad leg, he walked slowly.

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

$\Longrightarrow$ Because of the English course, I came here.

8) I went to schcol although it was hot.

$\Longrightarrow$ Despite hot weather, I went to school.

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

$\Longrightarrow$ Because of dirty room, I can't go in.

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

$\Longrightarrow$ Because it has too much smoke, we have to wear masks.

1. Because of the cheapness, many people baga to wearing jeans. 

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

3. Despite her good behavior, no one loves her. 

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

5. Because of Tom's lateness, Mary was worried. 

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

7. Because of wanting English course, i came here. 

8. Despite the hot weather, i went  to school. 

9. Because of the dirty room, i can't go in.

10. Because there is too much smoke, we have to wear masks.