(4) cho △ABC vuông tại B

a) cho \(AB=9\), \(BC=12\). tính AC và các góc của △ABC

b) kẻ đg cao BH; E, F lần lượt là hình chiếu của H trên AB, AC. c/m: \(BH=EF\) và \(BE.AB=BF.BC\)

c) gọi K là trg điểm AC, BK cắt EF tại I. c/m: BK ⊥EF

giúp mk vs ạ mai mk hc rồi

(2) giải pt: \(\sqrt{x^2-16}-2\sqrt{x+4}=0\)

giúp mk vs ạ, mai mk hc rồi

4. Of course you can come to the party.........

A. the more the merrier      B. the more and the merrier    C. the more and merrier

D. the more and more merrier

5. I feel........I did yesterday 

A. much more tired than            B. many more tired than         C. as many tired as

D. as more tired as

6. She is............a spectator

A. more an athlete than       B. more of an athlete than           C. an athlete more than         D. an athlete of more than

7. His house is............mine

A. twice as big as          B. as twice big as       C. as two time big as      D. as big as twice

8. ........live in HCM city than in the wholeof the rest of the country

A. as much as people            B. more people        C. as many as people      D. eople more

9. It gets.........to understand what the professer has explained

A. the more difficult        B. more difficult than            C. difficult more and more

D. more and more difficult

giúp mk vs ạ mk cần gấp

(8) choose the best option to complete the setences:

1. As she did so, her parents became.........

A. the angriest     B. the most angry   C. the more angry   D. angrier and angrier..

2. People should eat......and do.......to the risk  of heart disease

A. less fat/more exercise    B. less and less fat/the more axercise

C. the less fat/the more exercise     D. fatter/more exercise

3. He spent a year in India and loves spicy food.......the food is,......he likes it

A. the hotter/the more and more        B. the hotter/ the more

C. the more and more hot/the more         D. the hottest/ the most

giúp mk vs ạ mka cần gấp

peter is fat because he eats a lot of chips 

=> If...........

giúp mk vs ạ

1. their teacher is making them study hard

=>they...........

2. they began building this house 2 months ago

=> they have..........

3. I saw her 10 years ago

=>I haven't...........

4. I can't go out because it is raining

=>I wish............

giúp mk vs ạ mk cần gấp

(1) verb tense revision

1. John.......tennis one or twice a week

A. is playing usually     B. is usuallt playing    C. usually plays     D. plays usually

2. Tom.......his hand when he was cooking dinner

A. burnt       B. was burning       C. has burnt      D. had burnt

3. Jim is away on holiday. He.........to Spain

A. is gone         B. have been       C. has been         D. was

4. everything is going well. We..........any problems so far

A. didn't have         B. don't have       C. haven't had       D. hadn't had

5. Jane..........just a few minutes ago

A. left        B. has left          C. leaves         D. had left

6. Timson..........13 films and I think the latest is the best

A. made      B. had made          C. has made          D. was making

7. ..........Robert lately?

A. did you see         B. have you seen      C. do you see      D. are you see

8. when I was a child, I.........the violin

A. was playing        B. am playing       C. played         D. play

9. He.........for the national team in 65 matches so far

A. has played         B. has been played      C. played      D. is play

10. I'm busy at the moment. I.........on the computer

A. work         B. worked        C. am working              D. working

giúp mk vs ạ mk cần gấp