cho tam giác ABC vuông tại A co đường cao AH. Gọi E,F lần lượt là hình chiếu vuông góc của H trên AB,AC.

a) Cho AB=3cm, góc ACB=30 độ. Tính độ dài AC,HA

b) Chứng minh BE.BA+CF.CA+2HB.HC=BC^2

c) Biết BC=6cm. Tìm GTLN của diện tích tứ giác HEAF

Chuyển câu trực tiếp thành gián tiếp

1. Sometimes my mother tells me:"you don't have to be so tense"

2. Peter said:"i am looking forward to my grandfather's gift"

3."If i pass this test, my father will buy me a new skateboar" Peter said

4. I told my teacher:"i forgot to do my homework"

5. "Mr Brown owns two cars and three houses" Jim said

6. She said to me:"i can't do it by myself"

7. My mother said:"i will go on a business trip next week"

8. My manager said:"someone broke into our office yesterday"

9. He told me:"you may have trouble if you don't do your homework"

10. The singer said:"i started my career three years ago"

11. Jim told me:"its is not my book, it's yours"

12. "I have just received a postcar from my frogein friend" Ann said to me

COMPLETE EACH SENTENCE WITH A WORLD/PHRASE FROM THE BOX

painting/pottery/drum/lacquerware/conical hats

1. The products are called.........because they are decoratively covered with lacquerware

2. To play this...............,you should use your hands, not sticks

3. This vase is a beautiful piece of............It's made from clay dug from our river

4. Lots of Vietnamese girls like wearing...........and Ao Dai

5. When i am hon holiday, i usually buy.......as souvenirs because i love works

A B

1.pass down a.stop doing business

2.live on b.have a friendly relationship with somebody

3.deal with c.transfer from one generation to the next

4.close down d.reject of refuse something

5.face up to e.take action to solve a problem

6.get on with f.return

7.come back g.have enough money to live

8.turn down h.accept, deal with

1. ____kind ò you to help!

A. how B. what C. which D. when

2. i think the____leap beyond the next one will take us to the stars

A. medical B. educational C. technological D. logical

3. ____ as many ideas as possible

A. storm B. brainstrom C. cancel D. quarrel

4. Do you___a diary?

A. act B. go C. run D. keep

5. A large percentage of the runal population was___

A. rich B. illiterate C. famous D. ill

6. In Germany there is a____of giving workers a say in how their conpany in run

A. tradition B. pratice C. behaviour D. habit

7. We must just agree to___on this

A. give B. take C. differ D. include

8. The ritual of the party conference is acled_____in the same way every year

A. out B. in C. on D. at

CHOOSE THE CORRECT ANSWER TO COMPLETE EACH SENTENCE

1. I was glad that you___the scholarship

A. gaining B. to gain C. gained D. to be gained

2. The economy has experienced steady_____

A. improvement B. difference C. foundation D. suggestion

3. My____has grown up without the experience of a world war

A. generation B. destine C. system D. children

4. We need to make people more aware____these problems

A. to B. of C. that D. about

5. When we arrived at the station, the train____

A. has gone B. would go C. went D. had gone

6. The government is running a campaign to promote adult_____

A. literature B. illiteracy C. literacy D. sense

7. They enjoy a very comfortable_____

A. street B. lifestyle C. lesson D. economy

8. You decision will____affect your future

A. considerable B. significantly C. surprising D. cooperatively

9. We lived in a____cotage when i was young

A. thatched B. rubber C. paddy D. building

10. I used to smoke, but i____up a couple of years ago

A. had given B. gave C. was giving D. have given

11. We___to the noise from the traffic now

A. are used B. used C. have used D. don't use

12. Two____were injured in the accident yesterday

A. mushroom B. vehicles C. pedestrians D. walkaways

13. My friends are more___, more willing to accept me for what i am

A. astonished B. confident C. obedient D. tolerant

14. You'll be relieved to know your job is safe

A. dramatic B. rude C. relieved D. sorry

REWRITE THE SENTENCES

1. To make you agree with me is disapointing (it.....)

2. It isn't easy to keep in touch with his mother (to.....)

3. Nga started to keep this dog 4 years ago (for)

4. You are interested in protecting the environment. We are delighted (that)

5. Are you certain ? Your brother will help us with the problems (that)

6. He drank a lot of black coffe. He wants to keep awake (so as to)