I. Find the word which has a different sound in the underlined part
1. A. activity 2. A. come 3. А. lunch 4. A. funny 5. A. school 6. A. mothers 7. A. cities 8. A. grandparents 9. A. fridge 10. A. television 11. A. best 12. A. copy 13. A. book 14. A. job 15. A. airport 16. A. biscuit 17. A. eleven 18. A. these 19. A. meet 20. A. hill 21. A. forest 22. A. bake 23. A. plant 24. A. nest 25. A. biggest B. compass B. someone B. computer B. lunch B. teaching B. centres B. watches B. brothers B. light B. toilet B. part B. happy B. beautiful B. tab B. speak B. busy B. village B. valley B. pretty B. dream B. bench B. take B. hat B. question B. island C. thank C. brother C. calculator C. sun C. chess C. aunts C. dishes C. uncles С. picture C. bed C. pie C. beast C. butterfly C. pen C. notebook C. beach C. luggage C. field C. seen C. king C. lend C. cake C. map C. coast C. August D. have D. volleyball D. uniform D. computer D. chalk D. cousins D. houses D. fathers D. living D. basket D. pen D. pull D. professional D. neighbor D. spoon D. women D. beach D. sea D. sheep D. six D. chest D. natural D. cap D. first D. cost
S=a^1+a^2+... +a^13=7
a^1+a^2+a^3=a^4+a^5+a^6=a^7+a^8+a^9= a^10+a^11+a^12=-5. Tính a^13
tìm a nguyên biết (a^2-1)(a^2-4)(a^2-7)(a^2-10)<0
S = a ^1 +a^2 +a^3 +...+a^13=7. Biet a^1+a^2+a^3=a^4+a^5+a^6+a^7+a^8+a^9+a^10+a^11+a^12=5. Tinh a^13
\(S=a^1+a^2+a^3+...+a^{13}=7\)
\(\Leftrightarrow\)\(\left(a^1+a^2+a^3\right)+\left(a^4+a^5+a^6+a^7+a^8+a^9+a^{10}+a^{11}+a^{12}\right)\)\(+a^{13}=7\)
\(\Leftrightarrow\)\(5+5+a^{13}=7\)
\(\Leftrightarrow\)\(a^{13}=7-5-5=-3\)
11.Who told you of the news? The _______________ may not be correct.
A. inform
B. information
C. informational
D. informative
12.The cost of ___________ is very high in big cities.
A. live
B. living
C. lived
D. life
13.The businessmen of ancient Egypt hired ______ to shout about the things they wanted to sell.
A. criers
B. players
C. hackers
D. singers
14.It took me 2 hours______________ this work.
A. do
B. to do
C. did
D. doing
15.He thinks that ______________ on the Internet is a waste of time.
A. chat
B. chatting
C. chatter
D. to chat
16.We can see many international programs _______________different channels.
A. in
B. at
C. on
D. of
17.The internet is a very fast to get ___________.
A. inform
B. information
C. informatic
D. informative
18.I don’t know ___________ website is useful for me.
A. why
B. who
C. when
D. which
19.Your father will go to Hanoi next week, ________?
A. will
B. won’t
C. does
D. doesn’t
20.When did you finish ______________ the kitchen?
A. paint
B. painted
C. painting
D. to paint
21.By learning English , you can get access to the world’s __________.
A. develop
B. developing
C. development
D. developed
22.Can you tell me who ____________this machine?
A. invented
B. invention
C. inventor
D. inventive
23.The next stage in the development of television is _________TV.
A. interact
B. interaction
C. interactive
D. interactively
24.Remote controls are used to ____________with TV.
A. interact
B. interaction
C. interactive
D. interactively
25.She left without___________ goodbye.
A. say
B. to say
C. said
D. saying
11. B
12. B
13. A
14. B
15. B
16. C
17. B
18. A
19. B
20. C
21. C
22. A
23. C
24. A
25. D
Đọc đoạn văn dưới đây :
Mexico City is the capital city of Mexico . It's the biggest city in the world . It has a population of 13,6 million .
Tokyo is capital of Japan . It's smaller than Mexico City . It has a population of 12 million .
The capital of England is London . It's the smallest of these three cities . It has a population of 6,3 million .
Viet Nam's capital is small . It has a population of 6,2 million .
Chọn đáp án đúng :
1 . The biggest city in the world is ........
a, London b, Ottawa c, Tokyo d, Mexico City
2. The smallest of these three cities is .........
a, Tokyo b, London c, Mexico City d, Paris
3. London has a population of ..........
a, 6,3 million b, 13,6 million c, 12 million d, 13,6 million
4. The Capital of Viet Nam is .............
a, Ho Chi Minh b, Hai Phong c, Hanoi d, Hue
Đọc đoạn văn dưới đây :
Mexico City is the capital city of Mexico . It's the biggest city in the world . It has a population of 13,6 million .
Tokyo is capital of Japan . It's smaller than Mexico City . It has a population of 12 million .
The capital of England is London . It's the smallest of these three cities . It has a population of 6,3 million .
Viet Nam's capital is small . It has a population of 6,2 million .
Chọn đáp án đúng :
1 . The biggest city in the world is ........
a, London b, Ottawa c, Tokyo d, Mexico City
2. The smallest of these three cities is .........
a, Tokyo b, London c, Mexico City d, Paris
3. London has a population of ..........
a, 6, 3 million b, 13,6 million c, 12 million d, 13,6 million
4. The Capital of Viet Nam is .............
a, Ho Chi Minh b, Hai Phong c, Ha Noi d, Hue
Chúc bạn học tốt!
1d, Mexico City
2.b, London
3. a, 6, 3 million
4. c, Ha Noi
Chúc bạn học tốt! 
1 . The biggest city in the world is ........
a, London b, Ottawa c, Tokyo d, Mexico City
2. The smallest of these three cities is .........
a, Tokyo b, London c, Mexico City d, Paris
3. London has a population of ..........
a, 6, 3 million b, 13,6 million c, 12 million d, 13,6 million
4. The Capital of Viet Nam is .............
a, Ho Chi Minh b, Hai Phong c, Ha Noi d, Hue
s=a1+a2+a3+...+a13
Biết a1+a2+a3=a4+a5+a6=a7+a8+a9=a10+a11+a12=a13. tính a13
giúp mk vs
(a+10) + (a+11) + (a+12) + (a+13) + (a+140) = 1000
(A+10) + (A+11) + (A+12) + (A+13) + ( A+14)=1000
A+10+A+11+A+12+A+13+A+14=1000
5A+(10+11+12+13+14)=1000
5A+60=1000
5A=1000-60
5A=940
A=940:5
A=188
(a+10)+(a+11) +(a+12) +(a+13) +(a+ 140) =1000
(a+a+a+a+a) +(10+11+12+13+140)=1000
5a +186 =1000
5a =1000 - 186
5a =814
a =162,8
t cho mình nha
( a + 10 ) + ( a + 11 ) + ( a + 12 ) + ( a + 13 ) + ( a + 140 ) = 1000
( a + a + a + a + a ) + ( 10 + 11 + 12 + 13 + 140 = 1000
a x 5 + 186 = 1000
a x 5 = 1000 - 186
a x 5 = 814
a = 814 : 5
a = 162,8
1. Don’t make a fire here. It’s very .................dangerous............... . (danger)
2. Air ...............pollution............. is a big problem in many cities in the world. (pollute)
3. There are a lot of ...............beautiful.............. mountains in VietNam. (beauty)
4. I’m Vietnamese. What’s your .................nationality................ ? (nation )
5. We must be ...................careful................. when we cross the road. (care)
6. There are lots of ..............beautiful............. beaches in Viet Nam. (beauty)
7. Is Mr. Ha a..............businessman............. ? (business)
8. She’s from Viet Nam. What’s her.............nationality.............? (nation)
9. Air............pollution........... is a big problem in the big cities. (pollute)
Chúc bạn học tốt!
1. Don’t make a fire here. It’s very dangerous.
2. Air pollution is a big problem in many cities in the world.
3. There are a lot of beautiful mountains in VietNam.
4. I’m Vietnamese. What’s your nationality ?
5. We must be careful when we cross the road.
6. There are lots of beautiful beaches in Viet Nam.
7. Is Mr. Ha a businessman ?
8. She’s from Viet Nam. What’s her nationality?
9. Air pollution is a big problem in the big cities.
1. dangerous.
2.pollution .
3. beautiful
4. nationality
5. careful
6. beautiful
7. businessman
8. nationality
9. pollution
so sánh A và B A= -11^12 B = -17^18
Ta có: 1112 < 1718
=> -1112 > -1718
=> A > B
do 11 và 12 < 17 à 18
=> \(11^{12}< 17^{18}\)
=> \(-11^{12}>-17^{18}\)
