Write the correct form of words.

11. He is ____friendly______ so he has few friends at school. (Friend)

12. My father is a ________policeman_______ and my mother is a ____teacher______ (Police/teach)

13. He is fat and the shirt is so small. It is ______uncomfortable_______to wear. (Comfort)

14. Do you have any _____informal______ about the new teacher? (Inform)

15. Your test is ________different________ from mine (Differ)

16. What is your _______nationality_____ ? - Korean. (Nation)

17. There are many social ________action________ after school. (Act)

18. It is ____useful______ to play sports (Use)

19. Pele is the best football _____player_____ of all time. (Play)

20. John is good at many sports. He is very ________sporty_______ ( Sport)

À mình ko giỏi vẽ rất xin lỗi bạn

21.at
22.about
23.of
24.in
25.of

Bai 1 : 1, Do ... visit
Bai2 /
1. as a king of football
2.about watching a romantic movie ?
3.your favorite sport ?

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. like
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

a) Thay m = 1 vào hệ ta được hê phương trình:

-2x + y = 5

x + 3y = 1

=> -2x+ y = 5

2x + 6y = 2

Cộng từng vế của pt ta được:

7y = 7 => y = 1 => x = -2

Vậy (x;y) = (-2;1)

b) Từ PT thứ nhất trong hệ => y = 2mx + 5. Thế vapf PT thứ hai ta được: mx + 3. (2mx +5) = 1

<=> 7mx = -14 <=> mx = -2   (*)

+) Nếu  m \(\ne\) 0  <=> (*) có nghiệm là  x = -2/m => y =  1 

Khi đó,  hệ có nghiệm là (-2/m; 1)

+) Nếu m = 0 thì (*) <=> 0 = -2 Vô lí => (*) vô nghiệm <=> Hệ vô nghiệm

Vậy.................

c) Với m \(\ne\) 0 thì hệ có nghiệm x = -2/m và y = 1 

Để x - y = 2 <=>( -2/m )- 1  = 2 <=> (-2/m) = 3 <=> m = -2/3 ( Thỏa mãn)

Vậy...................

1.Will you be
2.have collected
3.gives
4.doing
5.living / will move

1. I last visted Hanoi two years ago.
2. Neither of the chairs is comfortable.

1. Can't you do better than that

Is that ..............the best you can do.......................

2. I don't wnat to do anything too anergetic today

I don't feel ........ .like doing anything too energetic today......................

3. It isn't necessary for students to wear uniorm on Wednesday

Students.........have to wear uniform on Wednesday...............................

4. She feels comfortable to wacth TV

Wacthing TV ............makes her comfortable........................

5. My new jeans are more expensive than your

My new jeans isn't ...........as cheap as yours........................

6. We spent a whole day looking for these old picture

It took ......us a whole day to look for these old picture...........................

7. What is the distance between your hometown and your school?

How ..........far is it from your hometown to your school?...................

I (stay) __stayed___ at home all weekend

Nam (go)___ưent__ to the cinema last night

My friends(have) ___had__ a great time in Nha Trang last year

Last summer I (visit)___visited ___ Ngọc Sơn temple in Ha Noi

My parents (be)___were__ very tired after the trip

I (buy)___bought__ a lot of gifts for my little .