ai lm dc cho 100 like
5 chia hết n +2
n + 2 chia hết n -2
a = 2- 4-6 + 8 +10 - 12 - 14 + 16 +.... + 2018 - 2020+2024
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TL
24
28 tháng 8 2020
1. London is famous for …………… red buses.
A. it’s B. its C. it D. their
2. I always get …………… in my stomach before visiting the dentist.
A. worms B. butterflies C. crabs D. hedgehogs
3. That dog isn’t …………… it looks.
A. more dangerous than B. as dangerous as
C. dangerous asD. dangerouser than
4. There are …………… stores on the street.
A. hundreds of B. hundreds C. hundred ofD. of hundreds
5. …………… means creating new products from used materials.
A. ReduceB. Reuse C. Recycle D. Rebuild
6. The wall ……………
A. is high one meterB. has one meter
C. is one long meterD. is one meter high
7. We always need more players. Why don’t you come…………… ?
A. on B. along C. with D. after
8. Airmail is ………….. than surface mail.
A. much expensive B. very more expensive
C. much more expensiveD. more much expensive
9. She started learning English 3 years ago.
A. She started learning English 3 years.
B. She has learnt English for 3 years.
C. She started learning English since 3 years.
D. She learnt English since 3 years.
10. This programme is very ……………
A. inform B. information C. informative D. informing
11. He has a garage. That garage is …………
A. him B. of him C. his D. of his
12. “- …………. a nice T-shirt, Trang!” _ “ Thank you”
A. How B. What C. Which D. It
13. Trees drop their leaves in the ……………
A. spring B. summer C. autumn D. winter
14. I can’t understand why ……………… such bad words.
A. did she say B. does she say C. she said D. she says
15. If we cut down more trees, there …………… more floods.
A. are B. were C. have been D. will be
16. That is …………… book I’ve ever read.
A. the borest B. the boring C. the most boring D. the most bored
17. Mineral water is ……………
A. uncoloured B. uncolourful C. colourless D. uncolour
18. We should use reusable water bottles ………… of plas ones.
A. instead B. because C. despite D. however
19. ………… you swim when you were ten?
A. Can B. Could C. Will D. Might
20. We should use ………… pens and pencils to reduce rubbish.
A. reliable B. reusable C. refillable D. sociable
21. You should pay more …………… in class.
A. part B. care C. noe D. attention
22. Who is ………… of the two girls?
A. tallest B. the tallest C. taller D. the taller
23. You had better ………… if you want to catch the bus
A. to run B. running C. run D. ran
24. Are there …………… stores on your street?
A. a B. an C. any D. the
25. Do you go out ………… ?
A. in the afternoon on Fridays B. on Fridays in the afternoon
C. on afternoons Friday D. on Friday afternoons
26. ………… lives in a very big house.
A. A. Queen of England B. Queen of England
C. The Queen of the England D. the Queen of England
27. How long ……………… there before moving here?
A. did you live B. do you live
C. have you lived D. will you live
28. On Sunday mornings I stay in bed ………… 8 o’clock.
A. until B. at C. from D. to
29. She studies very well but she always feels ……… when she faces a lot of people.
A. unconfidentB. confidently C. unconfidently D. confidence
30. We shouldn’t cross the street outside the ………….
A. pavement B. foot lane C. sidewalk D. zebra crossing
31. Tom: “…………” - Jake: “She is kind.”
A. What does your teacher ? B. What would your teacher ?
C. What does your teacher look ? D. What is your teacher ?
32. …………… long or short?
A. Does Mai have hair B. Is Mai’s hair
C. Does Mai’s hair have D. Is Mai of hair
33. Nam can wait hours for his friends without getting angry. He is a ………… boy.
A. hard-working B. free C. patientD. active
34. He s stamps. He is a stamp …………
A. collect B. collecting C. collector D. collects
35. Look at ………… girl over there.
A. one B. the C. that D. a
* Mất nhiều thời gian dzữ ~~
TL
24
28 tháng 8 2020
Vì tuổi mẹ cộng tuổi con bằng 5/4 tuổi mẹ
=>Ta coi tuổi mẹ=4 phần. Tuổi con=5-4=1 phần
Tuổi con là
\(24\div\left(4-1\right)=8\) tuổi
Tuổi mẹ là
\(8+24=32\)tuổi
Hok tốt !!!!!!!!!!!!
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