Chủ đề:

Luyện tập tổng hợp

Câu hỏi:

1.My parents are unhappy because I get bad mark.(If)

2.I had a fever,so I didn't go to the party yesterday (because)

3.No river in the world is longer than Nile river.(Nile river)

4.You mustn't use mobile phone in class,boys.(Don't)