http://oxford.edu.vn/goc-tieng-anh/hoc-tieng-anh-cung-oxford/ngu-phap-tieng-anh-cau-bi-dong-622.html

1 giờ Hạnh làm được:

1:3=1/3(công việc)

1 giờ Thương làm được:

1:6=1/6(công việc)

1 giờ cả 2 người làm được làm được:

1/6+1/3=1/2(công việc)

Cả 2 người cùng làm thì sau số giờ xong công việc là:

1:1/2=2(giờ)

chúc bạn học tốt !!!!!!!

It's April now and I'm going to have a trip in my next summer holiday. I wish to have a great holiday with friends and boyfriend, so I need to prepare a perfect plan. We are going to Co To island for three days by motobike and boat. Our trip will start from Hanoi to Van Don which is about 250 kilometer by motobike and then we need to move from Van Don to Co To island by boat. After that, we will have room accomodation in a hotel and have lunch in a restaurant. Near to hotel, we can have seafoods, such as shrimp, bib and so on. After lunch, we'll walk around places. The second day, we'll go to watch the sunrise in the morning. After hiring of motobike for people in the island to visit natural places over there, especially the lighthouse. Next to it, we'll go bathe, sunbathing and look at sunset together. On the third day, we'll go to market in the morning to buy things, which is only available there. Finally, we'll prepare luggage to return to Hanoi. During trip, camera, money, swimsuit, sunscreen, map, jacket, hat are indispensable things.

Hi, Jessica (hoặc thay bằng tên bạn tự đặt)

I'm going to tell you about Tet or the Lunar New Year holiday - the most important celebration for Vietnamese people.

On Tet holiday, everyone comebacks home to reunite their family. They buy gifts to give their family and their friends. Market has many types of cakes, fruits, food and flowers to serve for Tet. Special 30th December Lunar calendar, family is sitting around cooking fire to cook Banh Chung – a type has in Tet, and wait for and welcome new year. Start a lucky year, they gives lucky money together, its name’s Li Xi. Houses are decorated and painted and people buy news clothes to visit near relation. Tet is occasion to visit graves and meet old classmate. Tet has many festival; for example, flower, fireworks… and has many games; for example, Bai Choi, Dap Nieu Dat… In conclusion, tet is the time for people to understand and occasion to relax after they are assiduously working and make close relation.

To everyone of Vietnam, Tet is a sacred and meaningful occasion in their heart and mind.

Love,

(Tên bạn)

1. Viết lại câu sao cho nghĩa không đổi :

1. Huong's school bag is new

Huong has a new school bag.

2.Does Phong 's school have forty classrooms ?
Are there forty classrooms in Phong's school?

3.Phuong has a brother , Nam

Phuong is Nam's sister.

4.No house on the street is older than this house

This house is the oldest house on the street.

5.How many apples does she want ?
How many apples would she like?

6.Learning how to use a computer is veru easy

It is very easy to learn how to use a computer.

7.He drives very carefully

He is a careful driver.

8.Why don't we listen to music tonight?

How about listening to music tonight?

9.How much is this dictionary ?

What is this dictionary's price?

10.It often hot in the summer

It's never cool in the summer.

There are a lot of positive aspects of living in the country side, there are also some disadvantages. Living in the country is slower. People don't need to hurry and have a lot of time. People in the country don't have to work so many hours as they do in the city. On the other hand, they don't earn so much money. Moreover, there aren't such interesting things to do during free time. The unemployment rate is also much higher than in the city. The problem may be also the communication. If you don't have your own car, you may have problem how to commute to work. The same problem concerns the access to the hospitals, schools, police stations and shops, which are usually located far from the village. Last of all, there are some dangers connected with country life such as heavy snowfall or rainfall.

1991¹⁹⁹³ > 1993¹⁹⁹¹

V. Read and answer the questions:(2pts)

Peter is my pen pal. He is fifteen years old. He lives in a house in London. He has lived there for ten years. He is an excellent student. He always works hard at school and gets good marks. He loves learning Vietnamese in his free time. He often practices writing letters in Vietnamese. Sometimes he helps me to correct my writing, and I help him to correct his spelling mistakes. Next summer, he is going to visit Ho Chi Minh City with his family. I’m expecting to see him.

1. Where does he live?

He lives in a house in London.

2. What does he like doing in his free time?

He likes learning Vietnamese in his free time.

3.. Does he often practice Vietnamese by writing and reading?

No, he doesn't

4. Where is he going to do next summer ?

Next summer, he is going to visit Ho Chi Minh City with his family.

VI. Complete the passage with the suitable words in the box(1pt)

interesting visit because and neighbor autumn

Lan was Hoa’s next-door (1) neighbor in Bac Giang. She is very beautiful. She has big brown eyes and a lovely smile. Last summer ,she went to Da Lat to (2) visit Hoa. They traveled around the city and saw a lot of (3) interesting places such as waterfalls, flower gardens. Hoa likes living in Da Lat. Lan also likes living there because Da Lat is a very beautiful place and quiet . Lan is going to visit Hoa next summer and she will be there during the summer.

VII. Use the following words to write meaningful sentences (1pt)

1.Why / not / he / go / movie theater / last night ?

Why didn't he go to the movie theater last night?

2. We/ enjoy/ tell/ jokes.

We enjoy telling jokes.

3. I/ going/ see/ John/ tonight.

I'm going to see John tonight.

4.She/ often/ have/ short holiday/ Christmas.

She often has a short holiday at Christmas.

VIII. Write the second sentence so that it has a same meaning as the first (1pt)

1. Tom wasn’t hard-working. He couldn’t get good marks.

=> Tom wasn’t hard-working enough to get good marks.

2. Her hair is long and black.

=> She has long black hair.

3. My father smoked a lot 5 years ago but now he gives it up.

=> My father used to smoke a lot 5 years ago.

4. Swimming across this river is dangerous.

=> It is dangerous to swim across this river.

I. Choose the word having the underlined letters pronounced differently (1pt)

1. A. how B. hour C. humorous D. hair

2. A. visited B. heated C. locked D. corresponded

3. A. generous B. reserved C. device D. experiment

4. A. study B. music C. fun D. subject

II.. Choose the best answer ( 2pts)

1. It is really a difficult test but we will try to do it ______

A. ourself B, ourselves C, itself D, itselves

2. You are too thin. You ______ to eat more.

A, ought B, has C, should D, must

3,We live in a house ______ to the store

A. on B. in C. under D. next

4, Would you like ______ a message ?

A. leave B. to leave C. leaving D. to leaving

5, My father has a good ______ of humor , so everyone likes to talk to him.

A, feeling B, sense C, knowledge D, memory

6, A: Is she going to drive a car? B: No, she’s ______

A. not enough old to drive a car B. enough not old to drive a car

C. not old enough to drive a car D. enough old to drive a car

7.Don’t come in . Please wait ______ for your turn.

A. outside B. inside C. downstairs D. upstairs.

8, Can I ______ to Mary, please? This isNancy.

A. speak B. listen C. read D. write

III. Give the correct form of the verbs(1pt)

1,The sun ( rise ) rises in the East and sets in the west..

2, I’m going (tell) to tell my parents about the result of my exam.

3, What time (you / go ) will you go to the market tomorrow ?.

4, Last night , my children (make ) made a lot of noise , so I couldn’t sleep.