⦁ Circle the correct word or phrase. ⦁ 'Smoking isn't allowed in the airport.' You mustn't / don't have to smoke in the airport. ⦁ 'It’s not necessary to come to the train station to meet me.' You have to / don't have to meet her at the train station. ⦁ We were forced to wait for over two hours in the rain!' They had to / didn't need to wait for over two hours in the rain. ⦁ 'The instructions tell you to write in pencil.' You must / needn't write in pencil. ⦁ 'You can contact us by either phone or e-mail.' You mustn't / don't have to phone them. ⦁ 'In my country, you can carry your passport with you if you want, but it's not necessary.' In her country, you don't need to / mustn't carry your passport with you. ⦁ 'My grandfather was made to start work when he was just fourteen years old.' He had to / must start work when he was just fourteen years old. ⦁ 'It's not necessary to book a hotel; you can stay in our spare room.' You mustn't / don't have to stay in a hotel.

Đỗ Đăng Phương

Để giải bài tập trên, chúng ta cần nhìn vào mỗi câu và chọn từ hoặc cụm từ đúng để điền vào chỗ trống.

1. Smoking isn't allowed in the airport.
You mustn't smoke in the airport.

2. It's not necessary to come to the train station to meet me.
You don't have to meet her at the train station.

3. We were forced to wait for over two hours in the rain!
They had to wait for over two hours in the rain.

4. The instructions tell you to write in pencil.
You must write in pencil.

5. You can contact us by either phone or e-mail.
You don't have to phone them.

6. In my country, you can carry your passport with you if you want, but it's not necessary.
In her country, you don't need to carry your passport with you.

7. My grandfather was made to start work when he was just fourteen years old.
He had to start work when he was just fourteen years old.

8. It's not necessary to book a hotel; you can stay in our spare room.
You don't have to stay in a hotel.