Kết hợp câu: 11. We post poner our trip because the weather was bad. (As). 12. He couldn't meet you because of being busy. (Because). 13. Nobody can do the test because of it's difficult. (because)

Kết hợp câu:
11. We post poned our trip because the weather was bad. (As)
12. He couldn't meet you because of being busy. (Because)
13. Nobody can do the test because of it's difficult.( because)
14. She can't work hard because she is very old. (On account of)
15. I can't play basketball because of my height.( because)
16. He likes her because she is very beautiful.(because of)
17. We can't go for a walk because it rains heavily. ( because
18. They hard to cancel to flight because the weather was bad. ( due to)
19. Nam was very thirsty, so he drank a lot. (Because)
20. He can't go to school today because of his toothache (because)