Trong chuyện ăn khế trả vàng thì người em trai - the younger brother là nhân vật chính

        phút

 Thời gian kể từ khi người đi xe đạp xuất phát đến khi người đi bộ bắt đầu nghỉ là:

Quãng đường người đi xe đạp đi được trong thời gian đó là:

Vì 

Quãng đường người đi bộ đi được cho đến lúc nghỉ là:

Quãng đường người đi xe đạp đi được cho đến lúc người đi bộ nghỉ xong là:

Gọi  là thời gian kể từ lúc người đi bộ nghỉ xong cho đến khi cả hai cùng đến 

Quãng đường người đi bộ, người đi xe đạp đi được trong thời gian đó là:

Từ  và  ta có: 

 Khoảng cách từ điểm  đến vị trí người đi bộ ngồi nghỉ là:

Vận tốc của người đi xe đạp để gặp người đi bộ lúc bắt đầu nghỉ là:

Khoảng thời gian kể từ lúc người đi xe đạp xuất phát đến khi người đi bộ vừa nghỉ xong là:

Vận tốc của người đi xe đạp để gặp người đi bộ lúc vừa nghỉ xong là:

 Để người đi xe đạp gặp người đi bộ tại chỗ ngồi nghỉ thì người đi xe đạp phải đi với vận tốc từ  đến 

x ∈ [ -2; 6 ]

1. Tìm lỗi sai trong những câu sau

1.1. I decided to change jobs because my boss makes me work over time.

→ made 

1.2. Get more exercise appears to be the best way to lose weight.

→ Getting

1.3. Let’s stop to watch so much TV so that we can read or go out instead.

→ watching

1.4. I advise you starting looking for a flat at once.

→ to start

1.5. He postponed to make a decision till it was too late to do anything.   

→ making

Bài 2: 

a) 9,232323 < 9,232323....

b) -0,8912 > -0,89122.....

III. Cho dạng đúng của động từ trong ngoặc.

1. I was beginning (think) __to think__ you’d never come.

2. I enjoy (play) ____playing________ tennis and squash.

3. We’ve decided (not go) __not to go___ away after all.

4. I didn’t fancy ( swim) ______swimming______ in that water.

5. We’re considering (buy) ___buying___ a new car.

17. They spend their free time (collect) __collecting__stamp.

18 .  I would like (eat) __to eat__ some bananas.

19 . Where (be) __were__you yesterday, Lan ? - I stayed at home.

20.__Did__ you (come) __come__ here five days ago? - No, I didn’t.

21. What is your father (do) __do__ now ? - He (read) __is reading a__  newspapers.

Write a sentence for each situation. Use question tags.

~ You’re talking to a friend. You’re almost sure that he doesn’t like jazz.

~ You …don’t like jazz, do you…?

9. You’re talking to someone on a train. It’s very hot.

It’s .....................................................................................................................? 10. You’re talking to a friend. You’re almost sure that you’re older than her cousin.

I’m ....................................................................................................................? 11. You’re talking to your brother. Someone’s told you that the film starts at eight, but you don’t think this is right. You want to check.

The film ............................................................................................................? 12. You’re talking to a friend. You think her mother is a doctor, but you aren’t sure.

Your mother ......................................................................................................?

13. You’re talking to a friend. Someone’s told you that his sister works in a bank, but you don’t think this is right. You want to check.

Your sister ........................................................................................................?

Rewrite each sentence, beginning as shown:

1) I didn’t have an umbrella with me so I got wet.

I wouldn’t have gotten wet if I had an umbrella.
2) I’ll call the police if you don’t leave me alone.

Unless you leave me alone I will call the police.
3) In the snowy weather we don’t go to school.

If it didn't snow, we could go to school.
4) Without Jack’s help, I wouldn’t have been able to move this table.

If Jack helped me, I would have been able to move this table.
5) You drink too much coffee, that’s why you can’t sleep.

If you drink too much coffee, you can't sleep.
6) Make me some coffee, and I’ll give you some sweets.

If you make me some coffee, I will give you some sweets.
7) If you hadn’t told me about Sue’s hair, I wouldn’t have noticed her.

Unless you had told me about Sue's hair, I wouldn't have noticed her.
8) If you see Peter, tell him he should be here at 8 00.

Should you see Peter, tell him he should be here at 8.00.
9) I wouldn’t accept if you ask me to marry you.

If you were to ask me to marry, I wouldn't accept you.
10) What would you do if there were an earthquake?

Supposing there was an aearthquake, what would you do ?
11) If you do the shopping, I’ll cook lunch.

You do the shopping, I will cook lunch.
12) What would you do if you found some buried treasure?

If you were to find some buried treasure, what would you do?
13) If Paul hadn’t been interested, the project would have been abandoned.

But for Paul's interest, the projec would have been abandoned
14) If by any chance you find my wallet, could you let me know?

If you happen to find my wallet, could you let me know ?
15) I might be late. If so, start without me.

If I am late, start without me.
16) The fire was brought under control thanks to the night watch-man.

If it hadn’t been for the night-watchman's help, the fire would have out of control.
17) Dick is in prison because a detective recognized him.

If a detective had not recognized him, Dick would not in prison.
18) If you want my advice, I’d think twice about buying a car like that.

If I were you, I’d think twice about buying a car like that.
19) If the painting is finished by Saturday, we’ll pay you extra.

Finish the painting by saturday and we'll pay extra.
20) Getting up early makes me feel hungry.

If I get up early, I will feel hungry.