Cho đoạn thẳng AB. Trên cùng một nửa mặt phẳng bờ AB kẻ hai tia Ax, By vuông góc với AB. Trên tia Ax và By lần lượt lấy hai điểm C và D sao cho góc COD=90 độ(Olaf trung điểm của AB).CMR:

a) CD=AC+BD

b) CD là tiếp tuyến của đường tròn đường kính AB

c) AC.BD=\(\dfrac{AB^2}{4}\)

Chọn đáp án đúng:

1) She...wanted a house overlooking the sea

A. particularly B. strongly

C. essentially D. extremely

2) I couldn't find your number in the telephone...

A. department B. director

C. directory D. inquiry

3) Parents and teachers have to try hard to understand the younger...

A. generation B. people

C. adolescent D. teenagers

4) I want to...the drama club

A. go B. take

C. participate D. join

5) I'm sorry I screamed. Something...me

A. feared B. terrifying

C. scared D. depressed

6) They're both good....because they type carefully

A. typists B. typewriters

C. typers D. typemen

7) It was the first man-powered aircraft...half a mile

A. who ever fly B. whic ever fly

C. which ever flew D. that ever fly

8) She's been feeling much happier since she found the...key

A. losing B. lost

C. loser D. loss

9) Take the bus, and...in front of the library

A. get out B. get off

C. get down D. get away

10) An operation is usually performed by a...

A. doctor B. dentist

C. scientist D. surgeon

11) If she...you, she would not do that

A. was B. were

C. is D. would be

12) The purpose of the examination was to...the students knowl-edgee of the subject

A. try B. inspect

C. prove D. test

13) The bus driver couldn't...the accident

A. protect B. control

C. provide D. prevent

14) The child was told to...for being rude to his uncle

A. regret B. apologize

C. forgive D. confess

15) My uncle,... you met yesterday, is a lawyer

A. whose B. that

C. whom D. Both B and C are correct

16) Mr. Brown...in the army from 1960 to 1980

A. had served B. has served

C. served D. is serving

17) These teams haven't...any goals

A. recorded B. instructions

C. made D. answers

18) We always wash our clothes in this....

A. solution B. detergent

C. toothpaste D. soap

19) Woud you mind...the phone number? I didn't hear properly

A. to repeat B. repeating

C. repeat D. for repeating

20) The...was crowded with passengers waiting for the train

A. platform B. quay

C. runway D. pavement

21) The device used on top of buildings to pick up a TV signal is called a(n)...

A. aerial B. pick-up

C. radar D. parabola

Put in the blanks with SO or SUCH

1) Come on! Don't walk...slowwly

2) I've never read...an interesting book

3) Eveything is...expensive these days, isn't it?

4) It was...a boring film that I fell asleep at once

5) The wind was...strong. It was difficult to sleep

6) I like Tom and Ann. they are...nice

7) I'm afraid I can't remember. It was...a long time ago

8) After living there for...long, he must know the town very well

9) Why are you in...a hurry?

10) We have...much to do

Chọn đáp án đúng:

1.What about...? Will I be able to find a house?

A. accommodation B. qualification

C. indentification D. construction

2.... a fire, hotel guests are asked to remain calm

A. As a result of B. In the event of

C. By reason of D. In the time of

3. We didn't....to the station in time to catch the train

A. get B. reach

C. arrive D. make

4. She is... a singer nor an actress

A. nor B. both

C. neither D. either

5. England has a rainy... and umbrellas are very useful there

A. climate B. state

C. condition D. environment

6. She...a fortune from her aunt

A. drew up B. inherited

C. offered D. enjoyed

7. Edward has a... in french from Leeds university

A. certificate B. degree

C. mark D. paper

8. Lift the...and listen for the dialing tone

A. microphone B. dial

C. receiver D. number

9. A lot of my friends left school at 16, and they now...leaving so early

A. sorry B. regret

C. worry D. confuse

10. No sooner had he sat down to lunch... there was a knock at the door

A. when B. that

C. as D. than

Cho đường thẳng \(\left(\Delta\right)\): y=(m-1).x+\(m^2\)-4. Tìm m để \(\left(\Delta\right)\) cắt 2 trục tọa độ tạo thành tam giác vuông cân

Cho đường thẳng (d):y=mx-2m+5. Tìm m để (d) cắt hai trục Ox, Oy tạo thành một tam giác cân

Cho đường thẳng (d): y=mx-2m-1(\(m\ne0\)). Tìm m để (d) đi qua gốc O

Chọn đáp án đúng:

1) A few dáy ago, I...that Nga.... forr Ha Noi

A. learn-had left B. learned-had left

C learned-has left D. learn-will leave

2) ' Are you ready, Ann?' 'Yes, I...

A. am coming B. come

C. came D. have came

3) - Can I borrow your bike on Monday?

- I'm sorry, but ...it

A. I'll be using B. used

C. use D. have used

4) Sorry, I can't stop now. I... to an important appointment

A. go B. am going

C. have gone D. was going

5) I've... to Singapore. I... there last year

A. been-gone B. gone-went

C. been-went D. just-go

6) My brother won't come home... 10 p.m

A. until B. to

C. than D. in

7) Can you give me the... for this pie? It's delicious

A. prescription B. instructions

C. ingredients D. recipe

8) That od worker is living on his...

A. pension B. prion

C. service D. mission

Chọn đáp án đúng:

1) I ... lots about the job so far

A. have learnt B. am learning

C. had learnt D. learnt

2) You ... here for my party, won't you?

A. shall be B. won't

C. will be D. are going to be

3) It was 10 p.m. Most of the shops... just ...

A. have-closed B. had-closed

C. has-closed D. was-closing

4) Either of these buses ... past the university

A. go B. have gone

C. gone D. goes

5) - I'm worried about the exam

- Oh, ... all right

A. you would be B. you are

C. you had been D. you'll be

6) There're no more apples. We...them all

A. had eaten B. ate

C. eat D. have eaten

Chọn đáp án đúng:

1) The Olympic Games ... every fours years

A. take place B. takes place

C. took place D. is taking place

2) Tim was tired. He ... hard all day

A. has been studying B. studies

C. studied D. had been studying

3) It's a nice day. I ... we go out for a walk

A. suggested B. suggest

C. is suggesting D. are suggesting

4) It ... dark. Shall I turn on the light?

A. is getting B. get

C. got D. have got

5) I... for Christine. Do you know where she is?

A. look B. looked

C. am looking D. looks