1.Because of Tom's poverty, he  couldn't go to school
2.Because of the fact that i don't have enough money, i can't buy this bike
3. Because of the fact that he didn't learn the lesson carefully, he failed the exam.
4.Because of being tired, i  went to bed early
5.Because of the fact that Tom didn't have high salary, he worked so hard

Xin hay nhất!!!!!!!!

1. Tom couldn‟t go to school because he was very poor.

Because of being very poor,he couldn' t go to school

2. I can‟t buy this bike because I don‟t have enough money. 

Because of not having enough money, I can 't buy this bike

3. He failed the exam because he didn‟t learn the lesson carefully.

Because of not learning the lessons carefully, he failed the exam

4. I went to bed early because I felt tired.

Because of feeling tired,  i went to bed early

5. Because Tom didn‟t have high salary, he worked so hard.

Because of not having high salary,Tom worked so hard.