Số 1 có một số tính chất số học đặc biệt:
Số 1 nhân với bất cứ số nào cũng cho kết quả bằng chính số đó: x.1 = 1.x = x
Số 1 là ước của mọi số tự nhiên
Rút gọn biểu thức :
\(\frac{1}{\sqrt{x-1}-\sqrt{x}}+\frac{1}{\sqrt{x-1}+\sqrt{x}}+\frac{\sqrt{x^3}-x}{\sqrt{x}-1}\)
Rút gọn biểu thức P P= 1/ căn x+ căn x/ căn x+1÷ 1/căn x+1 - tìm giá trị nhỏ nhất của P
Khoanh vào đáp án đúng :
1. If it .................... this evening, I won't go out.
| A. rain | B. rains | C. raining |
2. If the weather gets worse, the children ....................... school for some days.
| A. don't have | B, won't have | C. wouldn't have |
3. The Browns had to use all their ................... to buy their house.
| A. expense | B. savings | C. reserves |
4. They will put off holding their wedding party next week.
| A. destroy | B. postpone | C. cancel |
5. If people ................ public transport, there will be less pollution.
| A. use | B. will use | C. can use |
6. Plants .............. it they don't get sun and water.
| A. die | B would die | won't die |
7. .................. air is one of the many problems we have to solve.
| A. Pure | B. Polluted | C. Dust |
8. I'll be in trouble if I ............... my passport.
| A. lose | B. will lose | B. lost |
9. If it is raining this evening, I .....................
| A. will go out | B. don't go out | C. won't go out |
10. I felt ............... disappointed because of their bad behavlor.
| A. real | B. reality | C. really |
11. Unless you understand, I ............... explain it again to you.
| A. am | B. was | C. will |
12. If you now where she lives, please let me ....................
| A. know | B. knew | C. to know |
13. If he ........... a student, he will get a discount.
| A. were | B. was | C. will be |
14. "Shall we go out to choose a birthday gift for Mary?" - "................"
| A. Good idea | B. Happy birthday | C, Yes, please do |
15. Let's go out for a drink.- ...................
| A. Yes, please | B. You are welcome | C. Good idea |
16. Let's go to Vung Tau on the weekend. - ................
| A. Yes | B. Yes, let's | C. Yes, please |
17. We are going to go on a picnic on Sunday. Would you like to join us ?
| A. You are right | B. Yes, I would | C. Yes, I'd love to |
18. Why don't we go to the cinema this evening ?
| A. Will you join us ? | B. Yes, let's ! | C. I'd like it |
19. What shall we do this evening ?
| A. No problem | B. Let's go out for dinner | C. Oh, that's good ! |
20. Would you like something to drink, Hoa ? - ................ I'm not thirsty.
| A. Great | B. No, thanks | C. Good idea |
21. A : How about going out to dinner tonight ?
B: ...............
| A. Oh, thank you | B. Yes, please | C. No, I don't want to |
22. Why don't we go for a picnic this weekend ?
| A. What do you suggest ? | B. Yes, please | C. How's that ? |
23. If he ............. hard today, can he have a holiday tomorrow ?
| A. works | B will work | C. worked |
help me ~ mai mik phải nộp rồi
1- She has the keys to the dining-room, ....................................?
1- I don’t have to come to the meeting, .................................?
1- Everything is okay, .......................?
1- Nobody told her, .......................................?
1- Nothing went wrong yesterday, .............................?
1- Something is wrong with Jane today,................................?
1- This is Mike’s dictionary, ....................................?
1- Have a cup of tea, ......................................?
1- Mr. White is a tailor, .................................?
1- The milk may be sour, .........................................?
Tìm x3:
a)\(\sqrt{x}=1\)
b)\(\frac{1}{2}\sqrt{x}+1=2\)
c)\(3\sqrt{x}-1=-1\)
Complete each of the sentences with the correct form of the words in the box.
| dynamic |
| delightful |
1) Formerly known as Saigon, Ho Chi Minh City is a metropolis which is still young but very_____.
2) Nha Trang, a______coastal city in Central Viet Nam, is generally recognized as Viet Nam's main beach destination.
Chuyển sang câu bị động:
1.He's a dangerous man. They ought to lock him up
2. People must hand in their weapons
3.Today a large number of people speak English
mọi người làm hộ em
1. Do you want to stop in this town, or shall we _______?
A. turn on B. turn off C. go on D. look after
2. Who will ________ the children while you go out to work?
A. look for B. look up C. look after D. look at
3. Please ________ the light, it’s getting dark here.
A. turn on B. turn off C. turn over D. turn into
4. The nurse has to _________ the patients at the midnight.
A. look after B. look up C. look at C. look for
5. There is an inflation. The prices __________.
A. are going on B. are going down C. are going over D. are going up
6. Remember to _______ your shoes when you are in a Japanese house.
A. take care B. take on C. take over D. take off
7. You can __________ the new words in the dictionary.
A. look for B. look after C. look up D. look at
8. It’s cold outside. __________ your coat.
A. Put on B. Put down C. Put off D. Put into
9. 15.If you want to be healthy, you should__________ your bad habits in your lifestyles.
A give up B call off C break down D get over
10. Never put off until tomorrow what you can do today.
A. do B. let C. delay D. leave
11. My father still hasn’t really recovered from the death of my mother.
A. looked after B. taken after C. gone off D. got over
12. The bomb exploded with a loud bang which could be heard all over the town.
A. went on B. went out C. went off D. went away
13. John, could you look after my handbag while I go out for a minute.
A. take part in B. take over C. take place D. take care of
14. Bill seems unhappy in his job because he doesn’t get _______ his boss.
A. up to B. on for C. on well with D. in with
15. Why do they ______ talking about money all the time?
A. keep on B. give up C. take after D. stop by
16. My father gave up smoking two years ago.
A. liked B. Continued C. stopped D. enjoyed
17. The government hopes to _________ its plans for introducing cable TV.
A. turn out B. carry out C. carry on D. keep on
18. When the tenants failed to pay their bill, the authorities decided to _____ the gas supply to the flat.
A. cut down B. cut out C. cut off D. cut up
19.You go on ahead and then I’ll catch _____ you.
A. along with B. forward to C. up with D. on to
Bài 3: Chuyển sang Câu bị động theo 2 CÁCH
1. He sent the girl a letter.
(1) => _________________________________
(2) => _________________________________
2. She is showing her friends the new computer.
(1) =>_________________________________
(2) =>_________________________________
3. Her mother often tells the girl tale stories.
(1) => _________________________________
(2) => _________________________________
4. They will pay you $500.
(1) => _________________________________
(2) => _________________________________
