1. where does your mother work?

She work in the hospital.

2.what is mai doing now?

She is playing chess now.

3.are they engineers?

Yes, they are

4.Is this your pen?

No,this isn't

Bài giải:

Chu vi bánh xe đó là:

1,9*3,14=5,966 (m)

         Đáp số:5,966 m

II.

1. His brother .will give... (give) a car for his twentieth birhday next year

2. The house was very quiet when I got home. Everybody.went..(go) to bed

3. Less than half of the cans of paint are using(use) up to now.

4. (Write)Writing the letter, she put it carefully in an evelop

5-6. Can you imagine what I was coming (come) across when I rolled (roll) up the carpet yesterday

7. He talked as if he knew(know) whare she was

28. If you go to England, you'll have to get used to driving (drive) on the left

29. You may feel frightened when you are in a forest surrounded(surround) by tall trees

30. -You have just missed the bus . - All right. I have walked (walk)

hình bát giác là hình gì vậy bạn

3T = 3² - 3³ + 3⁴ - 3⁵ + ..... - 3¹⁹⁹⁹ + 3²⁰⁰⁰

3T + T = (-3² + 3²) + .... + (-3¹⁹⁹⁹ + 3¹⁹⁹⁹) + 3²⁰⁰⁰ + 3

4T = 3²⁰⁰⁰ + 3

\(\Leftrightarrow T=\frac{3^{2000}+3}{4}\)

1Which program do you prefer ,the news or the film?- d.Oh the film

2-That film is boring to me -e .I don't think so

3-Will you go to the zoo with us tomorrow , Chi? -f.Yes, I will

4-Would you like to go the cinema with us , Mai? -a.Yes,but where can we meet ,Thanh?

5-I am sorry.I can't visit you tonight, Mary?-c. So do I

6-We prefer reading to watching TV- b. Why not,David ?

chuyển câu chủ động sang câu bị động

1. people clean and refill the empty bottles

=> The empty bottles are cleaned and refilled .

2. we can't wear jeans at work

=>Jeans can't be worn at work by us.

3. they will invite hoa to their wedding

=>Hoa will be invited to their wedding.

4.they will hold the contest tomorrow

=>The contest will be held tomorrow.

5.the boy can do the test tomorrow

=>the test can be done by the boy tomorrow.

tra loi giup voi

______ the gold medal, he will have to do better that that

a.To win

b. So he wins

c. That he wins

d. winning

Fill in each gap with a suitable preposition

1-Children should take part .....in.............. outdoor activities

2-eating healthy food is good........for........us

3-I often go skiing ........with...............some friends ............in.....winter

4-I'm realy interested.............in........VietNam history

5-I went ........with...........my parents ......to.........the zoo last Sunday