Hiệu số phần bằng nhau là:

3-1=2(phần)

Tuổi con hiện nay là:

26:2=13(tuổi)

Tuổi mẹ hiện nay là:

13+26=39(tuổi)

A.300 giây

1295+105+1460=1400+1460=2860

Đội thứ nhất trồng được số cây là:

      (1375+285):2=830(cây)

Đội thứ hai trồng được số cây là:

      830-285=545(cây)

Trung bình mỗi giờ An chạy được là:

      8 +2 =10(km)

Để hoàn thành chặng đua dài 2,5 km thì An phải mất:

         2,5 : 10= 0,25 (giờ)

11. The boy said to the girl he would never see her again.

12. He said to her she was his friend.

13.  Johnny said to his mother he didn't know how to do that exercise.

14. The childen said they were waiting for the school bus.

15. Marry said her father had died a year before.

2 dm2 5cm2=205 cm2

If it wasn't rain, they would go out for a meal.

C.speaks/comes

1. is drived

2. are checked

3. are often bought

4. is always cleaned

5. aren't served

6. is usually delayed

7. aren't used

8. Are ..... cooked...?

1 She ……………her teeth three times a day (brushed/ brush/brushes/ brus)
2 How……… is your brother? He's 1,70 meters. (high/ tall/ weight/ heavy)
3 You mustn't …………………up late. (stay/ to stay/ staying/ stayed)
4. He can speak English very well and ………………………… can his sister (so/too/ either/ neither)
5. Stop, please. That is too………………coffee. (many/ lots of/ much/little) will he (so/ tool neither/ either)
6. We won't attend the meeting tomorrow and ………… will he (so/ tool neither/ either)
7. There aren't many good programs……………………teenagers. (on/at/ to for)
8 A balanced dict is good your health (to/ with/in/ for)
9. As a child, Nam …………………his parents. (ought to obeying/ ought to obey/ ought obey/ ought obeying)
10. Many people just sit and ....... TV (look at/ see/ watch/watches)
II. Change the following adjectives into adverbs
1 good →……well………………
2. slow →………slowly……………
3. safe →………safely……………
4, sudden →……suddenly…………
5,fast →………fast………………
6, Bad →……badly…………………
7, quick →……quickly………………
8. skillful →……skillfully……………
9. dangerous →…dangerously………
10. hard→……hardly………………
III. Read the passage below then answer the questions
A Friend oceanographer, Jacques Cousteau (1910-1997), invented a deep-sea diving vessel in the early 1940s. In the vessel, he could explore the oceans of the world and study underwater life. Now we can explore the oceans using special TV as well. We can learn more about the undersea world thanks to this invention
A/ Answer the questions
1. Who invented a deep-sea diving vessel in the early 1940s?
➩Jacques Cousteau did
2. What did he invent?
➩he explored the oceans of the world and studied underwater life.

3 (x-1) - (2x-1) = 8-x

$\iff$3x - 3 - 2x +1 = 8 - x

$\iff$3x - 2x + x =8+3-1

$\iff$2x = 10

$\iff$x=5

2x - 20 - $5x^2$+ 10x = 2x - 10x - $5{\mathrm{x}}^2$ -10

$\iff$-20 + 10x = -10x - 10

$\iff$10x + 10x = -10 +20

$\iff$20x=10

$\iff$x = $\frac{1}{2}$

a, 15 tấn hàng còn lại chiếm :

100% - (15%+45%)=40%

Ban đầu cửa hàng có số tấn hàng là:

15:40 $\times$100= 37,5 (tấn)

b, Buổi sáng cửa hàng bán được số tấn hàng là:

37,5 : 100 $\times$ 15=5,625(tấn)

c, Buổi chiều cửa hàng bán được số tấn hàng là:

37,5-5,625-15=16,875(tấn)

*Mr Tan isn't going to travel to a Ha Noi next week

Is Mr Tan going to travel to a Ha Noi next week?

*We didn't often go to bed early

Do you often go to bed early?

*The girls aren't going to take some chairs into the sitting room

Are the girls going to take some chairs into the sitting room?

*Miss Lan can't drive a car

Can miss Lan drive a car?

*I am not going to help my mother

Are you going to help your mother?

*The boys aren't playing games

Are the boys playing games?

*She doesn't eat ice cream every day

Does she eat ice cream every day?

*He doesn't like some coffee

Does he like some coffee?

*Mai doesn't have some eggs every morning

Does Mai have some eggs every morning?

*They don't often drink coffee after dinner

Do they often drink coffee after dinner?

Was your brother born in 1987?

- No, he wasn't

Did she go to school yesterday afternoon?

-No, she didn't

1.   The tale is about a prince who is turned _________ a frog by his wicked stepmother.

      a.to                              b. into                          c. out                           d. over

2.   The hare always boasted _________ how fast he could run.

      a. at                             b. for                           c. on                            d. about

3.   A _________ is a story from ancient times about famous people and events that may ormay not be true.

      a. legend                      b. folktale                    c. fable                        d. fairytale

4.   In many cultures, a fox is the symbol for a _________ person.

      a. brave                        b. fierce                       c. cunning                    d. kind

5.   Vanessa is interested in reading Vietnamese folktales _________ she can’t readVietnamese well.

      a.although                   b.because                     c.while                        d.whereas

6.   What a _________ man he is! There’s nothing he wouldn’t do for us.

      a. mean                        b. generous                  c. gruel                        d. greedy

7.   Helen and I _________ together when the accident happened.

      a. talked                      b. have talked              c. was talking              d. were talking

8.   Tired of hearing the hare’s boast, the tortoise _________ him to a race.

      a. urged                       b. pushed                     c. challenged               d. suggested

9.   Sleeping Beauty was under a _________ when the prince found her.

      a. spell                         b. swear                       c. cloud                       d. wave

10. _________ young Ella finds herself at the mercy of her cruel stepmother and stepsisters.

      a.Despite her father unexpectedly dies,

      b.After her father unexpectedly dies,

      c.When her father unexpectedly dies,

      d. Due to her father unexpectedly dies.

1. I’m going to watch television from 9 until 10 o’clock this evening.

So at 9.30 I wil be going to watch television.

2. Tomorrow afternoon I’m going to play tennis from 3 o’clock until 4.30.

So at 4 o’clock tomorrow I will be going to play tennis 

3. Jim is going to study from 7 o’clock until 10 o’clock this evening.

So at 8.30 this evening he will be going to study

4. We are going to clean the flat tomorrow. It will take from 9 until 11 o’clock

So at 10 o’clock tomorrow morning we will be going to clean the flat

5. Tom is a football fan and there is a football match on television this evening. The match begins at 7.30 and ends at 9.15.

So at 8.30 this evening Tom will be watching a football match on television

You ought to go home late.

Phát triển bền vững là phát triển đáp ứng được nhu cầu của thế hệ hiện tại mà không làm tổn hại đến khả năng đáp ứng các nhu cầu đó của các thế hệ tương lai trên cơ sở kết hợp chặt chẽ, hài hoà giữa tăng trưởng kinh tế, giải quyết các vấn đề xã hội và bảo vệ môi trường.

Phải bảo vệ tài nguyên và môi trường biển - đảo, vì:

-Tài nguyên biển - đảo có sự giảm sút

+Diện tích rừng ngập mặn giảm nhanh

+Nguồn lợi hải sản giảm đáng kể, một số loài có nguy cơ tuyệt chủng (cá mòi, cá cháy,...), nhiều loài hải sản đang giảm về mức độ tập trung,...

-Môi trường biển bị ô nhiễm, nhất là ở các cảng biển, vùng cửa sông

-Hậu quả: làm suy giảm nguồn tài nguyên sinh vật biển, ảnh hưởng xấu tới chất lượng của các khu du lịch biển.