UNIT 1. A long and healthy life - có lời giải

1A. Pronunciation
• Strong and weak forms of auxiliary verbs
Underline the weak form and double underline the strong form of the auxiliary verbs in the following short exchanges. Then practise them with your partner.
1. A: Do you often work out in the morning?
B: Yes, I do.
2. A: Can you swim in the butterfly style?
B: No, I can’t.
3. A: Have you ever practised karate?
B: Yes, I have.
4. A: Aren’t you an aerobic instructor?
B: Yes, I am.
5. A: Didn’t you have time for the swimming practice yesterday?
B: No, I didn’t. I was busy yesterday.
6. A: Has she joined a gym?
B: Yes, she has.
7. A: Can doing squats bum a lot of calories?
B: Yes, it can.
8. A: Shall we go now?
B: I think we ought to.
9. A: Must we go now?
B: I think we must.
10. A: Does lifting weights build our muscles?
B: Certainly, it does.