1. Unit 2 It must belong to Carla.

3. Words & Expressions drop symphony optometrist appointment algebra crucial count final 落下 ; 掉下 交响乐 ; 交响曲 验光师 ; 配镜师 约会 ; 约定 代数 ; 代数学 关键的；至关重要的 计 ; 值 最后的 ; 最终的

4. Words & Expressions anxious worried owner Oxford University 忧虑的 ; 焦虑的 ; 不安的 烦恼的 ; 焦虑的 所有者 ; 业主 牛津大学

5. 3a

6. Here is a thank-you message Linda wrote to Ann. but it is not in the right order. You read it and put it in the right order. Answers: 5 2 4 3 1

7. When you read the message, you must meet some words you don’t know. Circle them and talk about them. Use can’t, must, could or might. Task Circled words may include: symphony; optometrist; appointment; crucial

8. Talk about these new words with your partners. A: Do you know the word “interview” ? B: No, I don’t. it might mean “…” A: Oh, yes! …

9. 3b Talk about the words you don’t understand. Use “can’t”, “must”, “could” or “might”.

10. A: What do you think “anxious” mean? B: Well, it can’t mean “happy”. A: It might mean “worried”. B: Oh, yes. She is worried because of her test.

11. A: What do you think “concert” mean? B: Well, it can’t mean “music”. A: It might mean “a performance of music by players or singers”. B: Oh, yes. She was in the symphony hall. Practice

12. 4 Pairwork

13. Look at the things in the backpack below. Make guesses about the owner of the backpack. Write your ideas in the chart. Then talk about your ideas. A: Here are some earrings. The owner can’t be a boy. B: Well, it could be a boy. The earrings might be a present for his mother.

14. Sample conversation 1 — Here is a Chinese-English dictionary. It could belong to Mary. I know she has one. — I don’t think so. It can’t be Mary’s. This one is new, but hers is old.

15. Sample conversation 2 — Here is a flower. The owner must be a girl. — Well, it could be a boy. The flower might be a present for his teacher.

16. Sample conversation 3 —— Here’s a school T-shirt. The owner must be a student. —— Well, it could be a classmate of ours. The school T-shirt is the same as ours.

17. Sample conversation 4 —— Here’s a hair band. The owner can’t be a boy. —— Well, it could be a boy. The hair band might be a present for his mother.

19. Tomorrow is Teachers’ day. We will give our English teacher a present. Can you guess what is in the box? A: Do you know what is in the box? B: I guess it must be a card. A: I don’t think so. I think it might be a scarf. B: why? A: …

20. 1. If you have any idea where it might be, please call me. If you have any idea … = If you know… 意思是 : 如果你知道 …… any 用于 if 引导的条件从句中, 有 “ 若干的，有多少 ” 的意思。 1. If you have any idea where it might be, please call me. If you have any idea … = If you know… 意思是 : 如果你知道 …… any 用于 if 引导的条件从句中, 有 “ 若干的，有多少 ” 的意思。 Explanation

21. e. g. If you have any time, I’d like to talk with you. 2. I think I dropped it during the concerts so it might still be in the symphony hall. 用在已知的时期、节日或表示时间 观念的名词前 e. g. If you have any time, I’d like to talk with you. 2. I think I dropped it during the concerts so it might still be in the symphony hall. 用在已知的时期、节日或表示时间 观念的名词前

22. e. g. during the summer, during my holidays, during our stay in Japan. 意思为 : “ 当 … 之际 ” 既可指某一动作 在某个时期内连续不断的发生, 也可 指某个动作在这一时期内的某一时 间发生： e. g. It snowed all day but stopped snowing during that night. e. g. during the summer, during my holidays, during our stay in Japan. 意思为 : “ 当 … 之际 ” 既可指某一动作 在某个时期内连续不断的发生, 也可 指某个动作在这一时期内的某一时 间发生： e. g. It snowed all day but stopped snowing during that night.

24. Suppose when you and your friend walk in the street. You see a man running from a supermarket and a woman is chasing behind him with heavy things. Make up a conversation with your partner. A: Oh, look! What’s happening over there? B: Where? A: A man running very fast from that supermarket. B: He might…