$\text{5.}$ Population is the most serious problem, isn't it?

$\text{→}$ Nếu vế câu chính là câu khẳng định thì câu hỏi là câu phủ định.

$\text{6.}$ Life in big cities can become very difficult and unpleasant, can't it?

$\text{→}$ Câu hỏi đuôi

$\text{7.}$ Los Angeles has over 3 million population.

$\text{8.}$ Flying cars will be used to travel around the world someday.

$\text{→}$ Câu bị động thì TLD: S + will be + Ved/ P2 + (by)

$\text{9.}$ Why don't you go to work by bike?

$\text{→}$ Why not + V?

$\text{10.}$ You didn't remember to turn off the TV last night, did you?

$\text{→}$ remember to-V: nhớ để làm gì

$\text{→}$ remember + V-ing: nhớ đã làm gì

$\text{→}$ Câu hỏi đuôi

$\text{11.}$ What is the distance between here and the Japanese restaurant?

$\text{→}$ What is the distance between swh and swh?

$\text{12.}$ In spite of moving to cities to find better jobs, people find living in the countryside more peaceful.

$\text{→}$ In spite of + N/ V-ing

$\text{→}$ Although + S + V

* Đầy đủ và ngắn gọn

$\text{# Xin ctlhn nếu dk ạ.}$

5. Population is the most serious problem, isn't it?

6. Life in big cities can become very difficult and unpleasant, can't it?

(Nếu mệnh đề phía trước là câu khẳng định, mệnh đề phía sau sẽ ở thể phủ định và ngược lại.)

7. Los Angeles has a population of 3 million people.

8. Flying cars will be used to travel around the world someday.

(Câu bị đông: S + be PII + (by O) ....)

9. Why don't you go to work by bike?

(Why don't you V: tại sao bạn không làm ...?)

10. You didn't remember to turn off the TV last night, did you?

(don't remember to V = forget to V: không nhớ làm gì = quên làm gì)

11. What is the distance between here and the Japanese restaurant?

(How far is is from .... to ....?= What is the distance between ... and ...?: khoảng cách từ ... đến ... )

12. In spite of moving to cities to find better job, they find living in the countryside more peaceful.

(Although + S + V, S + V ... = In spite of +Ving/ N, S + V = mặc dù ....)