B

D

C

D

I sometimes go walking in the mountain

Lan plays volleyball twice a week 

Minh usually goes swimming when it is hot

What are you going to do this summer?

Let's go camping this weekend 

B

C

is mine

go to school in

goes to school on foot

is the speed of that

can carry 200 people

Tách ra đi cậu

Do you use solar energy in your home?

People won't use flying cars until the year 2050

We must always obey the traffic rules for our safety 

The major cause of death for children living in the slums is malnutrition

Solar panels will be installed on the roof of our house next week

Veronica is a good friend of mine

Pollution is the most serious problem

must

musn't

can

musn't

must

musn't

Mr Pike and Mrs Pike aren't doctors

Are Mr Pike and Mrs Pike doctors?

There isn't a photocopy store near our school

Is there a photocopy store near our school?

My father doesn't work in the bank

Does your father work in the bank?

Unless we try to save our sources of energy, they'll soon end

Mike doesn't play chess as well as Barbare

um...mà cũng có thể bạn chỉ sai lỗi 1 thôi ;-; 

Bạn mắc 2 lỗi

1 là không in đậm Tham khảo

2 là hơi lạc đề

Giải phóng miền Nam thống nhất đất nước