có một số la mã lớn nhất đó là số la mã M

1. You should wash your hands before meals.

2. John is very good at math. He can do all math problems.

3. It's too late. I must go now.

4. She gets bad marks at chemistry. She ought to study harder.

5. The traffic lights are rad. You must stop.

6. Can I go to the movies now?

7. She could speak English when she was six.

8. Life is short. We shouldn't waste it.

9. I couldn't do my homework last night because I was too tired.

10. You oughtn't to walk alone after dark. It's dangerous.

1. Jacques Cousteau is an oceanographer.

2. He is French.

3. He was born in 1910.

4. When he died, he was eighty - seven years old.

5. He invented a deep - sea diving vessel.

6. In the vessel, he could explore the oceans of the world and study underwater life.

7. We can learn more about the undersea world thanks to his invention.