cho tam giác ABC có AB = 6cm, AC = 8cm, BC =10Cm, đường cao AH.

a) tính độ dài AH, HB, HC.

b) kẻ HD vuông tại AB. tia phân giác của gốc AHC cắt AC tại F. tính chu vi của tam giác ADF

1. The children were left behind by their parents

The children...................................................

The water was so cold that the children could not swim in it

The water was not.................................................................

Complete the centences

1. The people / be / friendly / hospitable

............................................................

2. Yesterday I / meet / my friend, lan / family. It / be / glad / meet / them

................................................................................................................

Rewrite the following sentences but unchanged their meaning

1. " Is Phong Nha - Ke Bang the most beautiful cave in VN? " Minh said to me

Minh asked.............................................................................

2. Vinh keeps forgetting his homework

Vinh is........................................

3. They use recycled plastic to make toys

Recycled......................................

II. Supply he correct form of verbs in brackets

1. He should know how (use)..........the computer

2. I advised her (ask)...............the bus conductor to tell her where (get off).............

3. We want (see)..............the house where William Shakespeare (bear).................

4. The first festival (hold)..............nearly 800 years ago

5. While my sister and I (watch)...............a movie on Tv last night, our uncle (phone)................

III. Correct the mistakes

1. How many people there are in the picture? ....................................

2. What does each person looks like? .........................

3. The bag is not enought big to carry everything ............................

4. Are you going to driving your father's car?

5. I'm not enough old to drive a car ..........................

6. Of my friends, Hoa is most sociable ...........................

7. She also extremely kind and generous? .....................

8. What's about you? Are you kind and generous? ......................

IV. Choose the best answer

1. .................. is a building or room where people can go to look at paintings ( Gallery / Library / University / Gym )

2. .................. is hot liquid rock that come out of a volcano ( Limestone / Marble / Lava / Ice )

3. I don't know what................ ( to do / for doing / to be done / be done )

4. I watched a film................ " The Clockwork Orange " ( called / calling / were called / be called )

5. Angkor Wat was originally built.................. Hindus ( for / of / to / on order for )

V. supply the correct form of verbs in brackets

1. He was eating when the milkman (come)..................

VI. Rewrite the following sentences but unchanged their meaning

1. The children were left behind by their parents

The children...................................................

2. He phone in order to talk to her

He phone so.................................

VII. Fill in the preposition in the bracket

1. I couldn't meet Mrs. Chi because she's............

2. He work very hard anf finally came.......... .............. a very important invention

VIII. Choose the word ( a, b, c or d ) that best fits each of the blank spaces

I can't (1)...... it, we're really here! The flight to Quito ( the capital ) (2)........... twenty-three hours. (3)..........we arrived, we were taken on a tour of Quito, (4)........as a ' hot dog ' by our guide because of its shape. After (5).......... the city from high up, we went down town (6)........the richly-decorated churches

1 a. think b. believe c. know d. all are correct

2 a. took b. had c. got d. received

3 a. as soon as b. as long as c. as far as d. as near as

4 a. describe b. describes c. describing d. described

5. a. view b. viewed c. viewing d. views

6. a. see b. seeing c. to see d. to seeing

IX. Choose the word that has the underlined part pronounced differently from the others

1 a. wharf b. place c. volcano d. plane

2 a. fisherman b. ticket c. prisoner d. over

3 a. hotel b. postcard c. shore d. cold

4 a. included b. called c. carved d. arrived

5 a. brochure b. teacher c. beach d. much

6 a. paddy b. sand c. travel d. tribal

7 a. buffalo b. photo c. limestone d. botanical

8 a. jungle b. luggage c. sunbather d. sugar

9 a. around b. various c. famous d. mountains

10 a. heritage b. giant c. garden d. village

X. Complete the sentences

1. weather / be / cool / sunny

............................................................

2. I / buy / many gifts / take / lot of / photos

.................................................................

Bài tập

Bài 1:

a./ Tại sao khi thả một cục đường vào một cốc nước rồi khuấy lên, đường tan vào nước?

b./ Tại sao khi muối dưa, cà... ta thường dùng nước nóng?

c./ Tại sao khi giặt quần áo bằng nước xà phòng nóng thì sạch hơn nước xà phòng lạnh?

d./ Một học sinh cho rằng: Dù nóng hay lạnh vật nào cũng có nhiệt năng. Kết luận đó có đúng không, tại sao?

Bài 2: Mở lọ nước hoa trong lớp, sau vài giây cả lớp đều ngửi thấy mùi nước hoa. Hãy giải thích tại sao?

Bài 3:

a./ Tại sao khi rót nước sôi vào cốc thủy tinh thì cốc dày dễ vỡ hơn cốc mỏng? Muốn cốc khỏi bị vỡ khi rót nước sôi vào thì làm thế nào?

b./ Tại sao vào mùa lạnh sờ vào miếng đồng ta cảm thấy lạnh hơn khi sờ vào miếng gỗ?

c./ Tại sao về mùa hè không khí trong nhà mái tôn nóng hơn không khí trong nhà mái tranh, còn về mùa đông không khí trong nhà mái tôn lạnh hơn không khí trong nhà mái tranh?

d./ Tại sao khi sờ vào len thấy ấm hơn khi sờ vào thanh đồng mặc dù nhiệt độ của hai vật là bằng nhau?

Bài 4:

a./ Tại sao về mùa hè không nên mặc áo sẫm màu?

b./ Hai ống nhôm đựng nước giống nhau đã được đun sôi, một ấm màu trắng, một ấm mày đen. Khi tắt bếp trong điều kiện như nhau thì ấm nào nhanh nguội hơn. Tại sao?

Bài 5:

a./ Giọt nước rơi vào quần áo. Nếu dùng tay chà vào chỗ ấy * Cấm nghĩ bậy =))) * thì mau khô hơn. Tại sao?

b./ Khi mài, cưa, khoan vào các vật cứng, người ta đổ thêm nước vào các vật cần mài. Tại sao?

Bài 6: Từ điểm A, một vật được ném lên theo phương thẳng đứng với vận tốc ban đầu v0. Vật lên đén vị trí cao nhất B rồi rơi xuống đến điểm C trên mặt đất. Cho biết cơ năng của vật A và C, giải thích

Bài 7: Trong ấm điện dùng để đun nước, dây đun được đặt ở gần đáy ấm hay gần nắp ấm. Giải thích tại sao?

Bài 8: Các bể chứa xăng thường được quét sơn màu trắng bạc. Tại sao phải làm như vậy

Bài 9: Tại sao săm xe đạp sau khi được bơm căng, mặc dù đã vặn van thật chặt, nhưng để lâu ngày vẫn bị xẹp?

Bài 10:

a./ Sau khi đá, quả bóng đang bay lên thì có những dạng cơ năng nào?

b./ Quả bóng bơm căng đang bị ép xuống thì có những dạng cơ năng nào?

Bài 11: So sánh động năng của các vật sau đây:

a./ Hai quả cầu có cũng khối lượng. Quả cầu 1 lăn nhanh hơn quả cầu 2

b./ Cùng chạy nhanh như nhau, xe 2 có khối lượng lớn hơn khối lượng xe 1

Bài 12:

a./ Tính thế năng của vật có khôi lượng P = 50N ở độ cao h = 4m?

b./ Hai vật có cùng khối lượng, vật 1 ở vị trí có độ cao bằng 1/2 độ cao của vật 2. Thế năng hấp dẫn của vật 1 gấp mấy lần thế năng hấp dẫn của vật 2?

Bài 13:

a./ So sánh thế năng đàn hồi của một lò xo khi bị kéo dãn thêm 5cm với khi bị kéo dãn thêm 8cm?

b./ Tại sao càng kéo căng dây cung thì càng bắn tên đi dược càng xa?

Bài 14: Một viên gạch nằm trên miệng giếng nước. Bạn A nói: " Thế năng của viên gạch bằng 0 ". Bạn B cãi lại: " Gạch vần rơi được xuống giếng và vẫn sinh công được. Như vậy thì thế năng của gạch khác 0 ". Ai đúng? vì sao?

Bài 15: Hai moto chạy cùng chiều song song với nhau. Nếu lấy xe này làm vật mốc thì động năng của xe kia là bao nhiêu? vì sao?

Bài 16: Khi một quả cầu rơi khỏi chần ta đang bay lên cao thì động năng, thế năng hấp dẫn của quả cầu thay đổi ntn?

Bài 17:

a,/ Bộ phận chính của đèn kéo quan là một chong chóng lớn đặt phía trên một cái đèn, quay được xung quanh một trục đứng. Khi thắng đèn thì chong chóng quay. Giải thích?

b./ nhiệt năng truyền từ Mặt Trời đến Trái Đất chủ yếu bằng hình thức nào? Vì sao?

c./ Tại sao mùa hề nên mặc áo trắng và không nên mặc áo đen?

d./ Tại sao phích đựng nước lại giữ cho nước nóng được lâu?

Ai làm ơn có lòng thương người thì hãy giải giúp mình bài tiếng anh này với ạ * Cảm mơn ai đó nhìu lắm *

Chose the best answer

We all know that recycling paper helps...(1)...trees but many of us may not know how...(2)...paper is recycled. Once the paper is collected and...(3)...to the factories, it has to be sorted by hand by people trained to recognize various types of paper. The sorted paper then is repulped or mixed...(4)...water and broken down into its individual fibers...(5)...variety of machinery is used to remove harmful materials...(6)...the mixture. After passing through the repulping process, the fibers must be de-inked. It means...(7)...different chemicals and detergents are added to whiten the fibers. Finally, in order...(8)...made into paper, these recycled fibers are refined or treated in such a way that they bond together

1. A. save B. to save C. saved D. saving

2. A. waste B. wasted C. wasting D. wasteful

3. A. send B. sent C. sending D.to send

4. A. in B. for C. of D. with

5. A. the B. an C. a D. ∅

6. A. from B. out C. over D. about

7. A. its B. that C. for D. to

8. A. to be B. be C. being D. to being

IV. Give correct form of the verbs in parenthese

1. Sydney Opera House..........(complete) in 1973

2. They..........(watch) a foodball match at 9 o'clock last night

3. Lan...........(live) in Ha Noi since 2005

4. While Hoa was eating, the phone...........(ring)

5. I (stay)............until you (come)............tomorrrow

6. This is the best wine I (drink)..............

7. He is reading " WAR AND PEACE ". How long...........she...........(read)?

8. Shakespeare (write)..............a lot of plays

9. I'm busy at the moment. I (decorate)..............the sitting room

10. I (buy)...........a new house last year, but I (not sell)............my old house yet, so at the moment. I (have)...........two houses

11. The boys (play)............cards when they (hear)............their father's step. They immediately (hide)............the cards and (take)............out their lesson books

12. When I (book)............for my passport * hộ chiếu * I (see)............this old photograph

13. He (lose)............his job last month and since then he (be).............out of work

14. Mr Pound is the bank manager. He (be)...........here for 5 years

15. ...........you (have)...........breakfast yet? - Yes, I (have)...........it at 8 o'clock

16. Tom (not go).............out since Mary's birthday

18. It started to rain while you (sleep)..............

19. He (cross).............the street when I (see)...........him yesterday

20. He (leave)..............home 2 weeks ago and we (not hear)...............grom him since

21. What.........you (do)..........at that time last week?

22. Last sunday, An (watch)............TV when Tom (come)..............here

23. John (do).................his homework already

24. Yesterday while I (water)..............the garden, it (begin).............to rain

25. He (read)............53 pages so far

26. .............he (write).............a novel a present?

27. They (not speak).............to each orther since they quarrele

28. Listen! Somebody (knock)............the door

29. Please don't say anything while I (learn)............my lesson

30. Mrs Green (take)...........Alice to the dentist's many times

2. Rewrite the sentences

1. " Is Ha Long Bay in the Northern VN, Phuong? " asked Mary

Mary asked Phuong..............................................................

2. When it began to rain, I was doing my lesson

While.....................................................

3. Do you mind if I borrow your dictionary

Would you.............................................

4. When he came, I was watching a football match

While..........................................................

5. We will grow a lot of trees in the park

A lot of...............................................

6. "You must see your teacher now " she said to me

She said that......................................................

7. The door was so heavy that the children couldn't push is open

The door was too..........................................................

8. They use grapes to make wine

Grapes...................................

9. It isn't necessary to finish the work today

You don't need..........................

10. The last time I went skiing was ten years ago

I haven't .................................................

11. Would you mind if I sat here?

Do you....................................

3. Write a postcard using the following sets of words and phrases

Dear Mom and Dad,

1. I / have / wonderful / time / Ha Long Bay

.....................................................................

2. weather / be / lovely / and / beach and islands / book / beautiful

.....................................................................

3. Yesterday / I / go shopping / Hon Gai Town

.....................................................................

4. I / be / going / visit / Dau Go Cave / tomorrow

.....................................................................

5. I am going to take some photographs in there

.....................................................................

Love,

Cho dạng đúng của ừ trong ngoặc để hoàn thành câu

1. First-aid is used to ease the victim's pain and (anxious)

2. She is a (flower). She sells flowers at a shop in the city center

3. Sapa is considered the most beautiful (mountain) resort in the north of VN

4. We can take buses and trains to the northern (destine) from Nha Trang

5. Our post is delivered (day) except sunday

6. She dances_________(beautiful)

7. They are waiting for the_________of our plane. (arrive)

8. It's__________to cross the avenue. (danger

9. The country's________resoures include forests, coal and oil. (nature)

10. Helen is one of the_________from friends of the Earth. (represent)

Ai đó làm ơn giải giúp mình bài tiếng anh này với * cảm mơn trước ạ!!! *

I. Phonetics

1. A. typed B. opened C. looked D. brushed

2. A. preferred B. cleaned C. needed D. ruled

3. A. disease B. dentist C. harvest D. helpful

4. A. improve B. decide C. neglect D. normal

1. A. leader B. spread C. greeting D. team

2. A. memorial B. snorkel C. wonder D. import

3. A. upset B. custom C. return D. unsuitable

4. A. saint B. tailor C. explain D. said

II. Choose the best word or phrase that completes each unfinished sentence

1. Thank you____inviting me to the rice-cooking festival

A. for B. at C. to D. of

2. Nga showed Nhi where___tickets

A. get B. to get C. getting D. got

3. It's too cold outside. Would you mind___the window?

A. close B. closed C. closing D. to close

4. The heads of four American presidents are___into the rock at Mount Rushmore

A. painted B. built C. seen D. carved

5. Eight hundred years ago, Christmas songs___performed for people in towns and villages

A. are B were C. will be D. have been

6. Angkor Watt now is a famous tourist____

A. attract B attractive C. attraction D. attractively

7. It was raining when he plan___to Hai Phong

A. get B. was getting C. were getting D. got

8. " Do you want to visit Dien Bien Phu , Linda?"-- Nam asked Linda___to visit Dien Bien Phu

A. if she wanted B. if he wanted C. if she wants D. if he wants

9. I think playing in the rain is___

A. danger B. endanger C. dangerous D. dangerously

10. " The pipes are broken " - He said the pipes___

A. break B. was broken C. were broken D. broke

11. While my family was eating, the phone___

A. ring B. was ringing C. were ringing D. rang

*.Finding the mistakes in each sentence

12. I had the gardener planted some trees last Sunday

A B C D

13. Greg is always forget his keys and that really annoys me

A B C D

14. Meat must kept in a refrigerator or it will spoil

A B C D

1. The man___in the garden now

A. working B. works C. worked D. is working

2. I'll___you up at the hotel at 7.30. Ok?

A. pick B. get C. make D. stand

3. For accommodation you can stay in___in Ha long Bay City

A. museums B. restaurants C. mini-hotels D. cafeterias

4. Peole use first-aid____ease the victim's pain and anxiety

A. so as not to B. in order to C. in order that D. so that

5. The doctor will___you, then give you some medicine and advice

A. take care B. examine C. look for D. take

6. The chidren are really looking forward___Tet holiday

A. at B. for C. to D. after

7. " I'm eating. Do you mind___down the TV? "

A. being turned B turning C. turn D. to turn

8. She promises the___from her holiday next month

A. return B. returns C. is returning D. will return

III. Reading. Read the text then answer the questions

It was the first time Jim went to HCM city with his parents. When the plane landed at Tan San Nhat airport, the they was fine. There was bright sun, and the sky was cloudless and blue.

It is said that HCM city is the city of sunshine

They took a taxi to the Rex Hotel, a very big hotel in the city center. After cheking in, they went upstairs to their room on the fifth floor. Jim was happy to see the sight of the city. Through the window of the bedroom , he could see the beautiful picture of the city. It was marvelous to see the city sparkling in colorful light at night

Jim visited many of the places of interest such as Nha Rong Harour Dam Sen Park Suoi Tien and Saigon Water Park. HCM city is famous for shopping malls. Jim bought a lot of souvenirs for his friends at Saigon Tourist Centre

The next evening, the whole family walked along the trees , then came into a well-known vegetarian restaurant to enjoy delicious food. It was really wonderful

1. Did they take a bus to the hotel from the airport?..............................

2. Where could he see the beautiful picture of the city?........................

3. Where did Jim's family have dinner?.................................................

4. Where was their room on?.................................................................

Read the passage and answer the questions below

Nha Trang,a beautiful city 442 km from HCM city is becoming more popular with tourists in recent years. However, with a population of 300,000, Nha Trang still remains small town atmosphere. The resort town is well-known for its miles of beach and the friendlinees of its people. The city is especially famous for its ten kilometers of sand beach where the water is clear all year round. Nha Trang has several offshore islands. The most remarkble ones are Hon Tre, Hon Yen, Hon Chong. The average temperature is 26 degree Centgrade. Nha Trang is among the top of all beaches in VN

1. How far is it from Nha Trang to HCM city?.....................................

2. Is Nha Trang a big city?....................................................................

3. What is Nha Trang famous for?........................................................

4. Does Nha Trang have any offshore islands?.....................................