1) D.uniform

2) A.about

3) C.at

4) B.doing

Là "packet".mk chọn nhầm (vì ko thấy cái bảng)

1,want  => want to

2,much => many

3,at       => bỏ

4,at       => in

    Umk có gì sai sửa cho mk nha

1)What  about going swimming?

2)You should do community service.

3)Why don't we listen to some music?

4)He'd like a cup of tea.

5)Lan is a volleyball player.

a) bang: 2,64m2

b)7,07m2

c)5,05 m2

d) 0,85 m2

1)If he is lazy,he will get bad marks.

2)If we use the car all the time,we will make the air dirty.

3)Sydney is the cleanest city inthe world.

4)If we plant trees in the school yard, our school will be a greener place.

1, If we pollute the air, we will have breathing problems.

2,If people pollute the water, a lot of fish will die.

3,If we cut down trees in the forest, there will be more floods.

 Yesterday, it rained, I can't go to Hoa's house

1,I didn't go to school yesterday because I had a bad cold 

2,Although Lan can sing very well, she can't play the piano 

Cho 2,24 lít khí CO (đktc) phản ứng vừa đủ với 10 gam hỗn hợp X gồm CuO và MgO. Phần trăm khối lượng của MgO trong X là

A. 20%

B. 40%

C. 60%

D. 80%