1. You are attending an economic conference,and you (don’t have to/ should) only shake hands with the other people when you meet them.

2. I (must/ should) clean my room three times a week and my mother can check it any time she wants.

3. You (shouldn’t/ have to) try to get on the bus before all other passengers get off.

4. When you see the door closed, you (mustn’t/ have to) knock before coming in or you may be said to be impolite.

5. You will visit an Italian family next week. When you are served bread, you (have/ must) break it with your hands instead of using knife.

6. When living in Spain, I (had to/ must) greet all people who lived next to my house although I had never talked to them, but now I (shouldn’t/ don’t have to) do this.

Có gì sai mong bạn bỏ qua hộ.

1.Don't have to

2.Should

3.Have to

4.Have to

5.Must

6.Had to - Don't have to

chúc em học tốt!!!!