Circle the correct asnwer :
1. They have turned (down/up) Jim's application for the job.
2. You may have to deal (with/about) many problem in the workplace.
3. Small birds mainly live (on/off) insects.
4. When does the plane take (off/up) ?
5. Why did you decide to take (on/up) skiing ?
6. Remember to warm (up/down) carefully before you play sports.
7. There's no need to dress (up/down). It is just an informal party.
8. Have you work (out/in) the solution yet ?
9. Oops, I think we are run out (of/on) petrol.
10. Jim seems not to get (on/off) well with his classmates.
11. My husband has decided to set (up/down) a business on his own.
12. Do you think Jame will find (out/up) the truth ?
13. Does Jim have many friends to count (on/off) in difficult time ?
14. Yesterday, my uncle dropped (to/by) my house to the surprise of everyone.
15. Were you brought (up/in) by your grandparents ?

Write the second sentences in such a way that the meanings stay the same as the first ones :
1. Because the weather was cold, they stayed at home.
=> The weather ......................
=> They stayed at home because of .............................
2. Because Mr. Ba is old, he can't join the game.
=> Mr Ba is ........................
=> Mr Ba can't join the game because of ....................
3. Because it was raining heavily, the game was cancelled.
=> It was .....................
=> Because of ......................
4. He wasn't successful because he was not hard enough.
=> He was not ..................
=> He wasn't successful because of .........................
5. He came late because his bike was broken.
=> His bike was ..................
=>He came late because of .......................
6. Although the sea was rough, the fishermen went fishing. (despite)
7. Though the test was difficult, we could finish it. (despite)
8. Though Mr Brown is old, he runs 5km every morning. (despite)
9. Although he tried hard, he was unsuccessful. (in spite of)
10. Even though he has a well-paid job, he wants to move to another company. (despite)
11. Though he is young, he is successful in business. (despite)

Read and choose the correct answer :
To many people, their friends are the most important in their life. Really good friends always (1) have/give/share joys and sorrows with you and never turn their backs on you. Your best friend ,ay be someone you have known all your life or someonen you have grown (2) up/in/through with.
There are all sorts of things that can bring about this special relationship. It may be the result of enjoying the same activitives and sharing experiences. Most of us have met someone that we have immediately felt relaxed with as if we had known them for ages. (3) So/However/Although, it really takes you years to get to know someone well (4) enough/too/such to consider your best friend.
To the majority of us, this is someone we trust completely and (5) which/who/whom understands us better than anyone else. It's the person you can tell him or her your most intimate secrets.

\(\Delta ABC\) vuông tại A, đường cao AH. Gọi D, E là hình chiếu của H trên AB, AC. Chứng minh :
a, AD.AB = AE.AC = HB.HC
b, DA.DB + EA.EC = HB.HC
c, AE.AB + AD.AC = AB.AC
d, \(AH^3=BD.CE.BC\)
e, \(\frac{AB^3}{AC^3}=\frac{BD}{EC}\)
f, \(\frac{1}{HD^2}+\frac{1}{HC^2}=\frac{1}{HE^2}+\frac{1}{HB^2}\)

Ở đậu hà lan, gen A quy định quả lục, a quả vàng
Cho lai quả lục thuẩn chủng với quả vàng. Hãy lập sơ đồ lai từ P đến F2.

Ở đậu hà lan, gen A quy định thân cao, a thân thấp
Cho lai cây thân cao thuẩn chủng với cây thân thấp. Hãy lập sơ đồ lai từ P đến F2.

Rewrite each of the following sentences beginning with the words given :
1. How long is it since you bought this car ?
=> When ................................ ?
2. It's two years since I saw her.
=> I haven't ................
3. It's easy to learn English.
=> To learn ...............
4. Lan likes listening to pop music.
=> Lan is interested ...............
5. People have used the Internet all over the word.
=> The Internet has .....................
6. "I'm having a wonderful time here" said Nga.
=> Nga said .....................
7. My mother must / has to go to work on Sunday. I don't like this.
=> I wish ....................
8. Linda's career as a television presenter began 4 years ago.
=> Linda has been ............
9. It is ages since I last saw you.
=> I haven't .............
10. We last saw him when we were students.
=>We haven't ............
11. She is the most beutiful girl I've ever met.
=> I've never .................

Conmbine these pairs of sentences using "such.........that" :
1. Tom was a tall man. He could almost touch the ceiling.
2. Mary is a good swimmer. She has won two gold medals.
3. He drank strong coffee. He couldn't go to sleep.
4. It was a long walk. The children got tired.
5. He told interesting stories. They all like him.
6. The boy made rapid progress. It surprised everybody.
7. He had a difficult exercise. He couldn't do it.
8. The speaker gave a long talk. Most of the audience felt sleepy.
9. We watched an exciting competition. We didn't want to go home.
10. It was an excellent show. We al enjoyed it.

Rewrite the following sentences as direcred :
1. It was such an expensive house that nobody can buy it. => The house was so ..........................
2. The food was so good that we ate all of it. => It was ....................
3. The patient was too weak to get up. => The patient was so ...................
4. This room is too dark for me to study. => This room is so .......................
5. This room is too small for us to take the meeting. => This room isn't .......................
6. The test was so difficult that we couldn't do it. => The test was not ...................
7. The map is so old that I couldn't read it. => The map is too ........................
8. He spoke so fast that we couldn't hear him well. => He didn't ................

Rewrite the sentences using "enough" or "too...to"
1. He is too old to wear this coloured shirt.
2. She is too weak to carry this box.
3. This pen is too expensive for me to buy.
4. Bill was too stupid to understand what I had said.
5. This bag is too heavy for her to carry.
6. The test was too difficult for them to do.