II. Make questions with "Why" and answer "Because" :
1. Why is Lan worried?
- Because she has to go to the dentist.
2. Why didn't Mai go to the meeting yesterday?
- Because she was sick.
3. Why should we brush teeth regularly?
- Because we want to have healthy teeth.
4. Why shouldn't we eat too much candy?
- Because it's bad for our teeth.
Chúc em học tốt nha.