$\text{Answers:}$

$\text{1. In spite of being a poor student, Tom studied very well.}$

$\text{2. Because of Mary's sickness, she could not go to school.}$

$\text{3. Despite the bad weather, she went to school on time}$

$\text{4. Because of a big storm, I stayed at home.}$

$\text{5. Although Tom had a good salary, he gave up his job}$

$\text{6. Although he is so young, his acting is excellent.}$

$\text{7. In spite of the fascinating film poster, I don't want to see this film}$

$\text{8. Despite our careful plan, we made some mistakes.}$

              $\text{Chúc bn học tốt!!11!!1              ٩(^ᴗ^)۶}$

1. Although Tom was a poor student, he studied very well. 

=> In spite of  the fact that Tom was a poor student, he studied very well

2. Mary could not go to school because she was sick.

=> Because of Mary was sick, she could not go to school

3.Although the weather was bad, she went to school on time. 

=> Despite the fact that the weather was bad, she went to school on time.

4. Because there was a big storm, I stayed at home. 

=> Because of there was a big storm, I stayed at home.

5. In spite of his good salary, Tom gave up his job.

=> Although Tom had good salary , he gave up his job

6. He is so young. His acting is excellent. 

=> Although he acting is excellent , he is so young

7. The film poster is fascinating. I don't want to see this film.

=> In spite of the fact that the film poster is fascinating,  I don't want to see this film.

8. Although our plan is careful, we made some mistakes.

=> Despite the fact that our plan is careful, we made some mistakes.