Dùng đèn pin chiếu vào quả địa cầu. Từ đó hãy giải thích:

-Tại sao thời gian ngày, đêm có độ dài khác nhau?

-Tại sao thường có 2 mùa trái ngược nhau ở bắc bán cầu, nam bán cầu?

Although they are short, they still love playing sports.

=> In spite of ..... .

Let's go swimming.

=> What ..... ?

III. Rewrite the second sentence in such a way that it has the same meaning as the one before it
1. I have never read such a romantic story
This is
2. We started cooking for the party four hours ago
We have
3. How long is it since they bought the house?
When
4. It’s years since we decorated this room
We haven’t
5. She hasn’t been to the hairdresser for three months
It’s
6. I’ve never met such a famous person before
It’s
7. They last visited me five years ago
They haven’t
8. I haven’t been to Bristol for 3 years
The last time
9. Laurence hasn’t seen his sister since she left for Japan
Laurence last
10. Lucy hasn’t worn that dress since Barbara’s wedding
The last time
11. My sister has studied French for 2 years
My sister began
12. I have never seen such a mess in my life
It’s
13. Robert and Catherine have been married for 4 years
It’s
14. When did Catherine and Henry get engaged?
How long
15. I have never seen a dirtier-looking dog
It’s
16. Mary rang hours and hours ago
It’s
17. Tom is ill. He became ill three days ago
Tom
18. It’s 2 years since she left university
She

19. I have never tasted such a delicious cake in my life
This is
20. How long is it since you saw Mary?
When

II. Supply the correct verb form: Past simple or Present Perfect
1. Mr. Greenm …………………….(teach) English in this school since he………… (graduate) from the university
in 1986
2. He ……………..(write) a book since last year
3. You ……………..(watch) TV last night?
4. I …………………………..(read) the novel written by Jack London several times before
5. Someone………………….. (steal) my handbag on the bus
6. Last month, I …………………(be) in the hospital for ten days
7. My father……………….. (not smoke) for 5 years
8. You …………………….(receive) any letter from your parents yet?
9. He………………… (leave) home two weeks ago and we…………………….. (not hear) from him since then
10. A: You ……………..(speak) to Mrs. Baker yesterday?
B: No, I……………… (not see) her for a long time

A: I …………………(not can) remember when I last ……………..(see) her
11. My brother ……………………..(join) the army when he …………….(be) young
12. Mr. Jackson …………….(paint) his house since last month
13. Columbus………………….. (discover) America more than 400 years ago
14. We………………… (study) French for five years at school but we……………. (not learn) very much
15. A: You……………………….. (teach) English before?
B: Yes, I………………… (have). I ……………………..(teach) English for three years in Hong Kong and
when I ……………….(come) back, I ……………..(start) teaching at the Kensington school of English and I
……………..(teach) there since then
16. A: I ………………..(see) Jack last night
B: Oh really? I ………………….(nor see) him for three months. How is he?
17. A: you ………………..(ever/win) a competition?
B: Yes, I ……………………(win) a photographic competition in 2001
18. Geoge …………………….(work) at the university so far
19. We ……………………….(not live) in England for two years now
20. When I ……………………..(be) a child, I ……………………(want) to be a doctor