Viết lại câu với từ cho trước

10. He couldn’t sleep because of his worries.

à Because ……………………………………………………………

11. He is tired because of staying up late last night.

à Because ……………………………………………………………

12. Maria couldn’t return home because of losing all her money.

à Because ……………………………………………………………

13. Because of my friend’s absence, I have to copy the lesson for him.

à Because ……………………………………………………………