Chuyển các câu sau

chuyển các câu sau 
1) Although it got dark , they continwed to work
2) Although it was noisy , I keep on studying
3) He ate all the fruit though it was green 
4) The flight was not delayed because it was foggy 
5) He couldn`t solve the problem though he is good at math
6) Although it rained heavily , I went to school on time 
7) Although the streads are harrow , many people drive cars in this city
8) He always studied hard though he encounters differen