bai 1

1.Because he was sick , he didnt come 

2.because of the thick fog , the train was late

3.because the weather was bad , the plane couldn't take off

4.because of poor his family , he lèt the school

5.becase there was noise , we couldn't study 

6.because of the cold , i didn;t go to swimming

7.because traffic is bad , these students arrive late

8.Mary can't sleep because having drunk a cup if strong coffe 

9.because he got up early , he wasn't late for the first train

10.because of having much experience , he was accepted for the job

bai 2

1.because kevin has failed many times , so he disappointed

2.i was very hungry because i hadn't eaten for 24 hours

3.because the fruits were ripe . he ate all the fruits

4.he didn;t go to sleep because he hadn't finhished the letter

5.he is dismissed because he was late for work very often

6.he caused a serious accident because he drove so fast

7.because the streets are narrow , so there aren't many people driving car in this city

8.i couldn't do the test because it was so diffcult

9.because i don't know russian , i have to have my document translater into russian

10.the children had an accident because they went to school late