(x+1)+(x+2)+(x+3)+....+(x+100) = 7450

=> 100x+ (100+1).100:2=7450

<=> 100x+ 5050=7450

<=>     100x= 2400

<=>            x=24

TA mà bn có phải là toán đâu

EX 4. Complete the sentences with the correct form in brackets.
1. You_____have bought______(buy) a new car.
2. I_________have been doing the gardening___(do the gardening) all day and my knees hurt.
3. They_____have not solved____(not solve) this problem yet.
4. Anthony, what____have you been doing______(do) in the attic for such a long time?
5. My hand________has swollen_____(swell) for 2 months.

EX 5. Choose the correct tense.
1. We didn’t need to clean the house because he had already done/already did it.
2. I studied business in the evening while I was working/had worked in the kitchen.
3. She left before anyone had had/was having a chance to explain the situation.
4. The business went/was going bankrupt last month and they couldn’t save it.
5. All last year, the company had looked/was looking for ways to survive.
6. When Akio Morita was 26, he had started/started his own company.
EX 6. Complete the sentences. Use Past Perfect or Past Simple.
1. Susan ___turned on____ (turn on) the radio after she ____had washed ____ (wash) the dishes.
2. When she __arrived_____ (arrive) to the match ______ already _______ (start)
3. After the man __had come____ (come) home, he __fed____ (feed) the cat.

How old is her grandfather ?

Her grandfather is 84 years old

What color are our uniforms?

Our uniforms is White and dark

How old is her grandfather? she is 84

what color are our uniforms? They are white and dark

What do you like doing? - I like watching TV

What do you like watching TV ?

How do they go to school? They go by bus

uk

Where does your friend live? - My friend lives in the city

giúp mk

friendly

1. Where do you go shopping?

2. I am having lunch with my friends now.

3. Now Mai is watching a video clip about science.

4. Mr. Minh is our favourite teacher. He teaches Science.

5. What do you usually do at break time?

6. Nam and Duy do not/don't doing their home work.

7. We often have Maths lessons on Monday.

8. How do you go to school every day?

9. Do you hungry?

10. Does your brother like pop music?

1) do      2) am      3) is    4) is     5) do

6) are    7) ....        8) do   9) are  10) does

We have geography every wednesday

(thì hiện tại đơn)

have