Viết lại các câu sau sao cho nghĩa không đổi.

1. Her old house is bigger than her new one.

-> Her new house is not as bigger as her old house.

2. No one in my class is taller than Peter.

-> Peter is the tallest student in my class.

3. The black dress is more expensive than the white one.

-> The white dress is not as expensive as this black dress.

4. According to me, English is easier than Maths.

-> According to me , Maths is more difficult than English.

5. No one in my group is more intelligent than Mary.

-> Mary is the most intelligent in my group.

6. No river in the world is longer than the Nile.

-> The Nile is the longest river in the world.

7. Mount Everest is the highest mountain in the world.

-> No mountain in the world is higher than Mount Everest.

8. This is the first time I have ever met such a pretty girl.

-> She is a pretty girl I have ever met.

9. He works much. He feels tired.

-. The more

10. This computer works better than that one.

-> That computer works worse than this computer.

11. The apartment is big. The rent is high.

-> The bigger apartment is shorter than the rent.

\(\dfrac{1}{21}+\dfrac{1}{28}+\dfrac{1}{36}+...+\dfrac{1}{x.\left(x+1\right):2}=\dfrac{2}{9}\)

\(\Leftrightarrow\dfrac{1}{2}\left(\dfrac{1}{21}+\dfrac{1}{28}+\dfrac{1}{36}+...+\dfrac{1}{x\left(x+1\right):2}\right)=\dfrac{2}{9}.2=\dfrac{4}{9}\)\(\Leftrightarrow\dfrac{1}{42}+\dfrac{1}{56}+\dfrac{1}{72}+...+\dfrac{1}{x\left(x+1\right)}=\dfrac{4}{9}\)

\(\Leftrightarrow\dfrac{1}{6.7}+\dfrac{1}{7.8}+\dfrac{1}{8.9}+...+\dfrac{1}{x}+\dfrac{1}{x+1}=\dfrac{4}{9}\)\(\Leftrightarrow\dfrac{1}{6}+\dfrac{1}{7}-\dfrac{1}{7}+\dfrac{1}{8}-\dfrac{1}{8}+...+\dfrac{1}{x}+\dfrac{1}{x+1}=\dfrac{4}{9}\)\(\Leftrightarrow\dfrac{1}{6}-\dfrac{1}{x+1}=\dfrac{4}{9}\)

\(\Leftrightarrow\dfrac{1}{x+1}=\dfrac{4}{9}-\dfrac{1}{6}=\dfrac{5}{8}\)

\(\Leftrightarrow\left(1.8\right)=5\left(x+1\right)\)

\(\Leftrightarrow8=5x+5\)

\(\Leftrightarrow5x=8-3=5\)

\(\Leftrightarrow x=5:5\)

\(\Leftrightarrow x=1\)

always/farmers/start/early/the/in/morning/those/work

=>Those farmers always start work early in the morning.

1. The ................... he is, the more miserable he gets

A. richer B. more riches C. more rich D. none is correct

2. Sharon.......... from other women I know

A. different B. as different C. differs D. more different

3. This one is prettier, but it costs................. as the one

A. as much as B. twice as much C. as many D. twice as many

4. You can take ................ books as you want

A. as many B. as much C. so much D. too many

5. Of the two sisters, Linda.......................

A. is beautiful B. the most beautiful C. is more beautiful D. is so beautiful as

I. Fill each blank with can, can' t, could, couldn' t, will be able to or won' t be able to.

1. Robots can' t talk now. In the future they _____will be able____ to talk to people.

2. In the past, robots _____couldn't_____ make coffee but they can now.

3. My younger brother ____could____ do sums when he was 5.

4. My sister ___could____ swim when she was 6.

5. ____Can_______ you speak English fluently and quickly ?

6. I ____can_____ write letters to my English friend.

7. I like teaching robot. They___can____ help us study better.

8. Robots _____will be able to___ guard the houses in the future.

9. ____Could_____ robot lift heavy things some years ago ?

10. In the future, robots ___will be able to_____ understand what we say.

câu hỏi twuong tự có nhé bn

gọi là 2 số lẻ liên tiếp : 2n+1 ; 2n+3 ( n thuộc N)
gọi d là ƯC( 2n+1 ; 2n+3 ) ( d thuộc N*)
=> 2n+1 chia hết cho d ; 2n+3 chia hết cho d => 2 chia hết cho d
=> d thuộc Ư(2) ={ 1; 2}
Vì 2 là số chẵn khác d nên d =1 
=> ĐPCM
 

Lan lives in a(1) .........village...... with her father ,mother, sister. She lives in a small house . It is not very large but very (2).........beautiful......... There is a garden in front of the (3) .........house........ In the garden there (4) beautiful flowers . She lives( 5)near her school , so every morning she (6).......walks..... to school with her (7).....friends..... . Her classes star at seven and they (8)......end..... at eleven . She (9).......likes... studying English (10) .....because.....she love to read books in English.