$M = \frac{\sqrt{x}+ 2}{\sqrt{x }+3}-\frac{5}{x +\sqrt{x} -6}+\frac{1}{2-\sqrt{x}}$ rút gọn

Write a passage to describe your close friend.(Viết đoạn văn tả người bạn thân của em)

FeSx +X---------->Fe2(SO4)3 +Y+Z
Tìm X,Y,Z giúp mik cần gấp hứa 5 sao

x nhỏ là chỉ số nha

FeSx +X---------->Fe2(SO4)3 +Y+Z
Tìm X,Y,Z giúp mik cần gấp hứa 5 sao

x nhỏ là chỉ số nha

2. There are three other people in the park. They ................................... (have) a picnic. It
looks like they ...................................have) a good time. One man ............................. (taste) a piece of chicken. The chicken ................................... (look) delicious. The other people ................................... (not/eat). They ................................... (play) cards.
3. John ................................... (want) to leave his office, but he can’t. He ....................... (belong) to a big company, and he ................................... (have) a lot of work to do today. He shouldn’t be looking outside the window. He should ................................... (think) about his work.

cho tam giác ABC cân tại A .Trên AB ,AC lấy các điểm M,N sao cho BM=CN

a)BMNC là hình gì ?Vì sao?

b)Tính các góc của tứ giác BMNC biết rằng 1 góc=50 độ

GIÚP HỘ EM VỚI

1.Hoa said that she………….to the zoo the next day. *
A.will go
B.had gone
C.would go
D.went
2.She was so lazy,………she couldn’t pass the exam. *
A.so
B.because
C.if
D.although
3.Choose the word that has a different stress pattern from the others. A. economic B. volcanic C.disappointed D. scientific *

5."What do you think about Maria"- "………………………………" *
A.I forget all about her.
B.She's sweet and gentle.
C.She went to York
D.No, I don't.
6. Can you please tell me ……………… *
A.What time arrives the next bus.
B.when arrives the bus.
C.when arrives the next bus.
D.What time the next bus arrives
7.Choose the word that has a different stress pattern from the others. A. reputation B. description C. suggestion D. pollution *

8.If you have finished the test, you……………the room *
A.can leave
B.had left
C.would leave
D.left
9.Anne worked too hard at the office, and this led to her illness. *
A.If Anne didn't work too hard at the office, she wouldn't be ill.
B.Every time Anne works hard at the office, he is ill
C.Anne's illness resulted from his working hard at the office.
D.Anne's illness prevented her from working hard at the office.
10.I can’t get used ....... so difficult exercises *
A.to do
B.to doing
C.do
D.doing
11.Although he is trong , he can't lift the box. *
A.Eventhough he is not strong, he can lift the box
B.In spite of his strength, he can't lift the box
C.He can't lift that box because is not strong
D.As he is strong, he can lift the box

Write the second sentence so that it has a similar meaning to the first. (2m)

1. There are a lot of flowers in my garden.

=> My garden..................................................

2. Ha Tinh is smaller than Nghe An.

=> Nghe An...............................................

3. Let's go to Ha Long Bay next summer vacation.

=> What about........................................................?

4. I want some milk.

=> I'd...................................................................

the telephone ... by Alexander Graham Bell

a, is invented 

b, invented

c, was invented

Bài 1. Chọn 1 từ trong số A, B, C hoặc D mà phần gạch chân có cách đọc khác so với các từ còn lại ở mỗi dòng.

1. A. nine B. time C. ride D. children

2. A. water B. walk C. talk D. work

3. A. go B. home C. photo D. hot

Bài 2. Chọn đáp án đúng nhất trong số A, B, C hoặc D để hoàn thành câu.

4. It is twelve o'clock now. We..... to have lunch.

A. want B. to want C. wanting D. are wanting

5. Do you like pop music ? -......

A. I would. B. Yes, a lot. C. No, I like it. D. Yes, we are.

6. Nam usually goes..... after school.

A. to fishing B. to home C. fishing D. home back

the telephone ... by Alexander Graham Bell

1.Hoa said that she………….to the zoo the next day. *
A.will go
B.had gone
C.would go
D.went
2.She was so lazy,………she couldn’t pass the exam. *
A.so
B.because
C.if
D.although
3.Choose the word that has a different stress pattern from the others. A. economic B. volcanic C.disappointed D. scientific *

5."What do you think about Maria"- "………………………………" *
A.I forget all about her.
B.She's sweet and gentle.
C.She went to York
D.No, I don't.
6. Can you please tell me ……………… *
A.What time arrives the next bus.
B.when arrives the bus.
C.when arrives the next bus.
D.What time the next bus arrives
7.Choose the word that has a different stress pattern from the others. A. reputation B. description C. suggestion D. pollution *

8.If you have finished the test, you……………the room *
A.can leave
B.had left
C.would leave
D.left
9.Anne worked too hard at the office, and this led to her illness. *
A.If Anne didn't work too hard at the office, she wouldn't be ill.
B.Every time Anne works hard at the office, he is ill
C.Anne's illness resulted from his working hard at the office.
D.Anne's illness prevented her from working hard at the office.
10.I can’t get used ....... so difficult exercises *
A.to do
B.to doing
C.do
D.doing
11.Although he is trong , he can't lift the box. *
A.Eventhough he is not strong, he can lift the box
B.In spite of his strength, he can't lift the box
C.He can't lift that box because is not strong
D.As he is strong, he can lift the box

Cho tam giác ABC vuông cân tại A. Gọi M là trung điểm của BC.
a) Chứng minh AM ⊥ BC và MA = MC.
b) Lấy điểm D trên đoạn thẳng AB (D khác A và B), đường thẳng vuông góc
với MD
tại M cắt AC tại E. Chứng minh: MD = ME.
c) Chứng minh: MD + ME ≥ AD + AE

1.There isn’t .................foreign news in the paper. *
A.a lot
B.many
C.much
D.some
2.She used to work as a typist,...............she? *
A.had
B.didn't
C.hadn't
D.did
3.There you are! I _____ for two hours. Where’ve you been? *
A.have waited
B.wait
C.had waited
D.waited
3.Jack can’t remember _____ the telephone number down. *
A.write
B.writing
C.to write
D.to writing

Cho đường tròn (O) và điểm I nằm bên trong đường tròn. Cm rằng trong các dây đi qua I thì dây vuông góc với OI có độ dài nhỏ nhất (vẽ hình luôn nha)

1.How old do you think this house is? *
A.Do you know when the house is built?
B.When do you think the house was built?
C.When is the house built ?
D.When do you think the house is built?
2." Does Jack know about your project". "Yes, I told him…………….to do" *
A.what I have planned
B.what was I planning
C.what did I plan
D.what I was planning
3.I have just .............................. a letter from my brother *
A.written
B.sent
C.received
D.bought
4.She has one of the biggest ………… in Britain. *
A.collect
B.collection
C.collector
D.collections
5.First aid for burns involves removing the source of the burn as soon as....... *
A.possible
B.well
C.good
D.can
6.The children…………………..to the zoo. *
A.were enjoyed taking
B.were enjoyed taken
C.enjoyed being taken
D.enjoyed taking
7.The cakes were too stale to eat. *
A.The cakes weren't fresh enough to eat.
B.The cakes weren't enough fresh to eat.
C.The cakes were so stale in order to eat
D.The cakes were very stale to be eaten.
8.I was made ....... hard by my teacher. *
A.working
B.to work
C.worked
D.work
9.).......... the heavy snow, she went out. *
A.Despite the fact that
B.Despite
C.However
D.Although
10.My sister looks ............... in the new dress *
A.gracefully
B.beautifully
C.graceful
D.beauty
11.They asked me……. I could help them. *
A.if
B.for
C.about
D.to

Supply the correct forms of verbs

13. I ______________ (play) sports now. I love going_____________ (play) sports.

14. Do you want ____________some food for me?(buy)

15. The girls _____________ (jog) now.

16. They ________________ (play) soccer at the moment.

17. (She, take) _______________________ some photos at present?

18. She________________ to eat fried rice. (not, want)

19. They _____________ (swim) at present

20. Would you like ______________ some food? (buy)

Supply the correct forms of verbs

7. He wants _______________ (travel) around the world.

8. Minh’d like _______________ (walk) in the rain.

9. Now Mr. Jones ______________ T.V. (not, watch)

10. What about ______________ (have) some coca cola?

11. What (you, watch) _________________________________ now?

12. What about______________ (eat) some rice now?

rút gọn biểu thức : 2cot a/2 /1+cot^2a/2