a: Sửa đề: \(\dfrac{1}{x+2}+\dfrac{3}{x^2-4}+\dfrac{x-14}{\left(x^2+4x+4\right)\left(x-2\right)}\)

\(=\dfrac{1}{x+2}+\dfrac{3}{\left(x-2\right)\left(x+2\right)}+\dfrac{x-14}{\left(x+2\right)^2\cdot\left(x-2\right)}\)

\(=\dfrac{x^2-4+3\left(x+2\right)+x-14}{\left(x+2\right)^2\cdot\left(x-2\right)}\)

\(=\dfrac{x^2+x-18+3x+6}{\left(x+2\right)^2\cdot\left(x-2\right)}\)

\(=\dfrac{x^2+4x-12}{\left(x+2\right)^2\cdot\left(x-2\right)}=\dfrac{\left(x+6\right)\left(x-2\right)}{\left(x+2\right)^2\cdot\left(x-2\right)}\)

\(=\dfrac{x+6}{\left(x+2\right)^2}\)

b: \(\dfrac{18}{\left(x-3\right)\left(x^2-9\right)}-\dfrac{3}{x^2-6x+9}-\dfrac{x}{x^2-9}\)

\(=\dfrac{18}{\left(x-3\right)^2\cdot\left(x+3\right)}-\dfrac{3}{\left(x-3\right)^2}-\dfrac{x}{\left(x-3\right)\left(x+3\right)}\)

\(=\dfrac{18-3\left(x+3\right)+x\left(x-3\right)}{\left(x-3\right)^2\cdot\left(x+3\right)}\)

\(=\dfrac{18-3x-9+x^2-3x}{\left(x-3\right)^2\cdot\left(x+3\right)}\)

\(=\dfrac{x^2-6x+9}{\left(x-3\right)^2\cdot\left(x+3\right)}=\dfrac{1}{x+3}\)

= 3|x - 5|   (1)

*) Với x ≥ 5, ta có:

(1) = 3(x - 5)

*) Với x < 5, ta có:

(1) = 3(5 - x)

UPSET 

I. Complete the second sentence:

1.We haven’t eaten this food since June.
→ The last time we ate this food was in June.

2.He doesn’t like getting up early on cold days.
→ He hates getting up early on cold days.

3.People are cutting rice now.
→ Rice is being cut now.

4.He enjoys watching football matches.
→ He is interested in watching football matches.

5.It is not necessary to set off early today.
→ You don’t need to set off early today.

III. Make sentences using the words and phrases given:

1.Would / you / like / drink / cup / tea?
→ Would you like a cup of tea?

2.The students / play / football / ground / moment.
→ The students are playing football on the ground at the moment.

3.This tree / plant / my father / 2 years ago.
→ This tree was planted by my father 2 years ago.

4.They / already / see / that film.
→ They have already seen that film.

5.He / used / go / picnic / weekends / last year.
→ He used to go on picnics on weekends last year.

III. Rearrange the sentences using the following words:

1.with / They / their / out / friends / eat / love / to.
→ They love to eat out with their friends.

2.often / to / does / come / boat / the / island?
→ How often does the boat come to the island?

3.The US // ethnic groups / over / a / is / with / multi-cultural/80
→ The US is a multi-cultural country with over 80 ethnic groups.

4.was / when / a fairy / The / appeared / crying / girl.
→ The girl was crying when a fairy appeared.

5. person / afraid / not / is / anything / Brave / of.
→ A brave person is not afraid of anything.

1. we haven’t eaten this food since june.

-> The last time we………ate this food was in June…………………………………………...

2. He doesn’t like getting up early on cold days.

-> He hates ……getting up early on cold days……………………………………………………...

3. People are cutting rice now.

->Rice…………is being cut now…………………………………………………………...

4. He enjoys watching football matches..

-> He is interested…in watching football matches……………………………..………………………...

5. It is not necessay to set off early today .

-You don’t ………have to set off early today………………………………….…………………....

III. Make sentences using the words and phrases given :

1. would/you/  like / drink  /cup /tea?

…………Would you like to drink a cup of tea?…………………………………………………………..

2. The students/ play /football/ ground /moment.

…………The students are playing football on the ground at the moment…………………………………………………………….

3. This tree / plant / myfarther / 2 years ago/./

…………This tree was planted by my father 2 years ago……………………………………………………………………

4. They/ already/ see/  that film/./ 

………They have already seen that film…………………………………………………………………….

5. He/ used / go/ picnic/ weekends/ last year/./

……He used to go for a picnic on the weekends last year………………………………………………………………………….

I. Read and complete the passage with words in the box.

Tom is going to spend a year in China soon, he’ll ...(1)… Chinese language and History at the university, he’ll live in the university, he’ll share the room with a Chinese student. Days start very early so he’ll have to get up at about six o’clock, he’ll have …(2)… at about six thirty. His classes will be in both …(3)… and Chinese, and they’ll begin at seven thirty. Lunch is …(4)… twelve and then there’s a rest until three. He’ll continue …(5)… until six. After that he’ll come back his room in the university. He thinks it’ll be difficult for him but he likes the course.

1…study…..    2 breakfast………..     3 English………     4…at………   5 learning

……

II. Choose the correct word A, B, C or D for each  gap to complete the following passage :

Tim goes to junior high school in California. He is Hoa’s pen pal. His mother works ....(1)...home. She takes...(2)... of the family. Three mornings a week, she works part-time at a  local supermarket. She and other women also cook lunch for homeless people once a week. His father works five days a week for about 40 hours. He has fewer...(3)...than his mother. His father has a...(4)...summer vacation. His family always ...(5)... to Florida on vacation.

1. A. in                       B. at                                   C. on                      D. from

2. A. care                   B. part                                C. time                   D. place

3. A. day of                B. days of                          C. day off               D. days off

4. A. three- week       B. three-weeks                   C. three weeks       D. three week

5. A. go                      B. goes                               C. going                 D. is going

III. Read the passage and answer these questions below.

     Yesterday when I was riding along a busy street, I saw an accident. A woman was knocked down when she crossed the street at a zebra crossing. Many people stopped to offer their help. A policeman arrived and asked a young man to telephone for an ambulance. While waiting for the ambulance, the policeman and some people tried to stop the bleeding. They used a handkerchief to cover the wound, then put pressure on it and held it tight. They tried to talk to her in order to keep her awake. After about ten minutes, the ambulance arrived and the woman was taken to the hospital.

A. Answer the following questions:

1.    When did the accident happen?

.............. The accident happened yesterday.

..............................................................................................

2.    What did they do to stop the bleeding?

......They used a handkerchief to cover the wound, put pressure on it, and held it tight.

......................................................................................................

3.    What did they try to talk to her for?

......They tried to talk to her in order to keep her  awake......................................................................................................

B. Choose the best answer to complete the sentences:

 1. ………..telephoned for an ambulance.

   A. a policeman          B. a sudent          C. a young man              D. a doctor  

 2. They tried to talk to her in order to ……………

  A. stop the bleeding                      B. keep her awake.    

C. keep her conscious                      D. B &C are correct

I. Read and complete the passage with words in the box.

Tom is going to spend a year in China soon, he’ll ...(1)… Chinese language and History at the university, he’ll live in the university, he’ll share the room with a Chinese student. Days start very early so he’ll have to get up at about six o’clock, he’ll have …(2)… at about six thirty. His classes will be in both …(3)… and Chinese, and they’ll begin at seven thirty. Lunch is …(4)… twelve and then there’s a rest until three. He’ll continue …(5)… until six. After that he’ll come back his room in the university. He thinks it’ll be difficult for him but he likes the course.

1……study……..    2……breakfast……..     3………English……     4………at……            5………learning…..

II. Choose the correct word A, B, C or D for each  gap to complete the following passage :

Tim goes to junior high school in California. He is Hoa’s pen pal. His mother works ....(1)...home. She takes...(2)... of the family. Three mornings a week, she works part-time at a  local supermarket. She and other women also cook lunch for homeless people once a week. His father works five days a week for about 40 hours. He has fewer...(3)...than his mother. His father has a...(4)...summer vacation. His family always ...(5)... to Florida on vacation.

1. A. in                       B. at                                   C. on                      D. from

2. A. care                   B. part                                C. time                   D. place

3. A. day of                B. days of                          C. day off               D. days off

4. A. three- week       B. three-weeks                   C. three weeks       D. three week

5. A. go                      B. goes                               C. going                 D. is going

Câu 5 thực ra go cũng dc nhé

Mình trả lời lại cho đỡ có người trả lời =)) 

I. Choose the best answer A, B, C or D to complete the sentences:

1. You should ____________  information about a custom or tradition.

A. finds                 B. found                      C. finding                D. find

2. A tradition is something we do that is special and _..................._ down through the generations.

3. In the UK, there are lots of customs for table manners. For example, we ____________ use a knife and fork at dinner.

A. have to                        B. are having                   C. has to                  D. having to

4. In Viet Nam, you...........use only the first name to  address people older than you.

A. should                         B. must                           C. shouldn’t             D. have to

5. At the Mid-Autumn Festival, kids can sing, dance, and enjoy moon-cakes ; ____________, every child likes it very much.

A. However                     B. Moreover                 C. Because                D. Therefore

6. ............spring comes, many Vietnamese villages prepare for a new festival season.

A. While               B. When                 C. Nevertheless         D. However

7.People burn incense to show respect to their ____________ during Tet.

A. relatives                       B. ancestors                     C. friends         D. neighbors

8.The Le Mat Festival ____________ the founding of the village.

A. worships                      B. commemorates            C. performs        D.preserves

9.Which ethnic group has the  largest population in Viet Nam? –“____________”

A. Kinh                            B. Muong                        C. Tay                    D. Hmong

10.The Lao is one of ……………… many Thai- speaking peoples.

A. the                               B. a                              C. an                       D. A and C

II. Give the correct form of the following verbs:

I. Choose the best answer A, B, C or D to complete the sentences:

1. You should ____________  information about a custom or tradition.

A. finds                 B. found                      C. finding                D. find

2. A tradition is something we do that is special and _..................._ down through the generations.

3. In the UK, there are lots of customs for table manners. For example, we ____________ use a knife and fork at dinner.

A. have to                        B. are having                   C. has to                  D. having to

4. In Viet Nam, you...........use only the first name to  address people older than you.

A. should                         B. must                           C. shouldn’t             D. have to

5. At the Mid-Autumn Festival, kids can sing, dance, and enjoy moon-cakes ; ____________, every child likes it very much.

A. However                     B. Moreover                 C. Because                D. Therefore

6. ............spring comes, many Vietnamese villages prepare for a new festival season.

A. While               B. When                 C. Nevertheless         D. However

7.People burn incense to show respect to their ____________ during Tet.

A. relatives                       B. ancestors                     C. friends         D. neighbors

8.The Le Mat Festival ____________ the founding of the village.

A. worships                      B. commemorates            C. performs        D.preserves

9.Which ethnic group has the  largest population in Viet Nam? –“____________”

A. Kinh                            B. Muong                        C. Tay                    D. Hmong

10.The Lao is one of ……………… many Thai- speaking peoples.

A. the                               B. a                              C. an                       D. A and C

II. Give the correct form of the following verbs:

Theo mình là A,who

giúp vs ạ

____is responsible for keeping the streets clean?-Everyone in the community

A.who/   B.whose/   C.whom/   D.when 

Nói về người thì dùng Who nha .

Câu nói về ai là người làm sạch đường phố ? trả lời là mọi người trong cộng đồng 

Ex1:
1 The last time we ate this food was in June

2 He hates getting up early on cold days

3 Rice is being cut now

4 He is interested in watching football matches

5 You don’t have to set off early today

Ex2:

1 Would you like a cup of tea ?

2 The students are playing football at the moment

3 This tree was planted by my father 2 years ago

4 They have already seen that film

5 He used to go on picnics on weekends last year

Ex3:

1 They love to eat out with their friends

2 How often does the boat come to the island?

3 The US is a multi-cultural country with over 80 ethnic groups

4 The girl was crying when a fairy appeared

5 Brave person is not afraid of anything

Ex1

1 study

2 breakfast

3 English

4 at

5 learning

Ex2:

B

A

D

C

B

Ex3:

A. Answer the questions

1. It happened yesterday

2 They used a handkerchief to cover the wound, put pressure on it, and held it tight

3 They tried to talk to her to keep her awake

B. Choose the best answer

1 C. a young man

2  D. B & C are correct