IV. Choose the best answer (A, B, C or D).
1. Do you believe that eating __________carrots helps you see at night.
A. most B. less C. the most D. much more
2. Don’t eat that type of fish, you may have a/an __________.
A. energy B. sick C. sore D. allergy
3. The seafood i ate this morning makes me feel __________ all over.
A. well B. weak C. itchy D. running
4. We should try to keep everything around us clean and then flu with find it __________ to spread.
A. difficult B. difficulty C. difficulties D.
5. The health __________ from that diet expert is that die expert is that you should eat less junk food and count your calories if you are becoming fat.
A. advices B. ideas C. tip D. tips
6. Be careful with __________ you eat and drink.
A. who B. what C. that D. this
7. Have a health __________ and you can enjoy your life.
A. lives B. lifestyle C. lifeline D. lively
8. Eating a lot of junk food may lead to your __________.
A. fitness B. obesity C. pain D. stomachache
9. We should follow the activities from doctors and health __________ in order to keep fit.
A. workers B. people C. experts D. managers
10. You can avoid some diseases by __________ yourself clean.
A. taking B. keeping C. bringing D. looking

11. We should play sports or do exercise in order to stay in ......................

A.look b.health C.fit D.shape

12.The Japanese eat a lot of fish instead of meat ...................... they stay more healthy.

A.because b.so C.although D.but

13. I forgot to wear a sun hat today and i got a . 
A. earache  B. backache  C. headache  D. stomachache
14. We need to spend less time computer games. 
A. play  B. to play  C. playing  D. to playing

15. When you have a temperature, you should drink more water and rest.....................
A. more  B. most  C. less  D. all
16. Rob eats a lot of fast food and he on a lot of weight.
A. takes  B. spends  C. puts  D. bring
17. When you have flu, you may have a cough and a nose.
A. running  B. runny  C. noisy  D. flowing
18. Do more exercises eat more fruits and vegetables.
A. and  B. or  C. but  D. so
19. Watching too much tv is not good you or your eyes.
A. at  B. for  C. with  D. to
20. After working on a computers for long hours, you should .....................your eyes and relax.

A. wake  B. rest  C. sleep  D. sleep in

IV. Choose the best answer (A, B, C or D).
1. Do you believe that eating carrots helps you see at night.
A. most  B. less  C. the most  D. much more
2. Don’t eat that type of fish, you may have a/an.............................
A. energy  B. sick  C. sore  D. allergy
3. The seafood i ate this morning makes me feel all over.
A. well  B. weak  C. itchy  D. running
4. We should try to keep everything around us clean and then flu with find it...........to spread.
A. difficult  B. difficulty  C. difficulties  D.
5. The health from that diet expert is that die expert is that you should eat less
junk food and count your calories if you are becoming fat.
A. advices  B. ideas  C. tip  D. tips
6. Be careful with you eat and drink. 
A. who  B. what  C. that  D. this
7. Have a health and you can enjoy your life. 
A. lives  B. lifestyle  C. lifeline  D. lively
5
8. Eating a lot of junk food may lead to your . 
A. fitness  B. obesity  C. pain  D. stomachache
9. We should follow the activities from doctors and health ...............in order to keep fit.
A. workers  B. people  C. experts  D. managers
10. You can avoid some diseases by yourself clean.
A. taking  B. keeping  C. bringing  D. looking
11. We should play sports or do exercise in order to stay in .
A. look  B. health  C. fit  D. shape
12. The Japanese eat a lot of fish instead of meat ......................they stay more healthy.
A. because  B. so  C. although  D. but
13. I forgot to wear a sun hat today and i got a . 
A. earache  B. backache  C. headache  D. stomachache
14. We need to spend less time computer games. 
A. play  B. to play  C. playing  D. to playing
15. When you have a temperature, you should drink more water and rest.....................
A. more  B. most  C. less  D. all
16. Rob eats a lot of fast food and he on a lot of weight.
A. takes  B. spends  C. puts  D. bring
17. When you have flu, you may have a cough and a nose.
A. running  B. runny  C. noisy  D. flowing
18. Do more exercises eat more fruits and vegetables.
A. and  B. or  C. but  D. so
19. Watching too much tv is not good you or your eyes.
A. at  B. for  C. with  D. to
20. After working on a computers for long hours, you should .....................your eyes and relax.
A. wake  B. rest  C. sleep  D. sleep in

Underline the odd word out.

1.plot: thrilling, terifying, delicious, fascinating

2. characters: convincing, fresh, believable, interesting

3. script: interesting, amusing, excellent, bad-tempered

4. acting: brilliant, fantas, lazy, wonderful

chúc bạn học tốt

1. delicious

2. fresh

3. bad- tempered

4. lazy

 Between August and November 1888, the Whitechapel area of London was the scene of five brutal murders. He was rightly called Jack the Ripper. The ripper was an infamous serial killer. He was the first serial killer to do so in a largely populated area, although it seemed he had no malice for other people. The ripper also had no accomplices and accessories to the crime. Another fact was that he escaped with no charges. All the women murdered were prostitutes, and all except for one (Elizabeth Stride) were horribly mutilated.
His method of attack was to let these prostitutes ‘seduce’ him into using them for their services, which at that time he would strangle them, making them unconscious and killing them, this was done by stalking his victims. This was no motive in his killing either. Oddly enough, it is shown that Jack the Ripper that this murderer was nice to his victims in certain ways.
The first murder, of Mary Ann Nicholls, took place on 31 August. Her throat was cut and her abdomen was cut open brutally, it showed the intestines. She was found by Mr. Llewellyn.
Annie Chapman was killed on 8 September. Her throat was cut and was very maimed. The abdomen was cut open and her intestines were placed on her shoulders.
Elizabeth Stride was murdered on 30 September. Her throat was cut, but she wasn’t maimed. She was found by Mr. Phillips and Mr. Blackwell.
Catherine Eddoweson was also murdered on 30 September. Her throat was cut, her abdomen was cut open and the intestines were placed on her right shoulder. She had a lot of injuries in her face and her left kidney removed. Pieces of Eddowes apron were found in the doorway of a building in Goulston Street. Above her was written a message with chalk: ‘ The juwes are the men that will not be blamed for nothing’.
Mary Jane Kelly was killed on 9 November. She was the youngest and most comfortable of Jack’s victims and she was the most and badly maimed. Many think that she was the only intentional victim. She was murdered in her own room and her heart was missing.
There had been much speculation as to the identity of the killer. It has been suggested that he or she was a doctor or butcher, based on the evidence of weapons and the mutilations that occurred, which showed a knowledge of human anatomy.
Violence to prostitutes wasn’t uncommon and there were many instances of women being brutalised, but the nature of these murders strongly suggests a single perpetrator.
Jack the Ripper was never caught and he is not thought to have killed again after November 1888.

\(\left(x+5\right)^2\ge0,\forall x\Rightarrow-\left(x+5\right)^2\le0,\forall x\)

\(|x-y+1|\ge0,\forall x,y\Rightarrow-|x-y+1|\le0,\forall x,y\)

\(\Rightarrow-\left(x+5\right)^2-|x-y+1|\le0,\forall x,y\)

\(\Rightarrow-\left(x+5\right)^2-|x-y+1|+2020\le2020,\forall x,y\)

\(\Rightarrow A\le2020\)

Vậy GTLN của A là 2020 khi và chỉ khi x=-5, y = -4

(x-  2)² + 1 \(\ge1\)

=> đề \(\le-2\)

Vậy min là -2 khi x = 2

Ai muốn gia nhập hội trai xinh gái đẹp thì k vào đây nha

a) \(\frac{a}{b}=\frac{c}{d}\)

\(\Rightarrow\frac{a}{c}=\frac{b}{d}=\frac{5a}{5c}=\frac{3b}{3d}=\frac{5a+3b}{5c+3d}=\frac{5a-3b}{5c-3d}\)

Đổi chỗ các trung tỉ cho nhau ta được: \(\frac{5a+3b}{5a-3b}=\frac{5c+3d}{5c-3d}\)\(\left(đpcm\right)\)

b)\(\Leftrightarrow\frac{x-1}{2004}+\frac{x-2}{2003}=\frac{x-3}{2002}+\frac{x-4}{2001}\)

Trừ cả 2 vế cho 2 . Đến đây thì dễ rồi.

có

(-5)^2*20^4/862*125

=25*(4*5)^4/64*125

=25*4^4*5^4/64*125

=25*5*4^3*4*5^3/64*125

=125*64*4*5^3/64*125

=4*5^3

=500

thank

<=> 3³ⁿ⁺⁶ : 3²ⁿ⁺⁴ = 3⁴

<=> 3^3n+6-2n-4 = 3⁴

<=> 3ⁿ⁺² = 3⁴

=> n + 2 = 4

<=> n = 2

Vậy n = 2