1.Whose book is this?

-> Who does this book belong to?

2.If you don't work hard, you won't pass the exam.

-> Unless you work hard, you will pass the exam.

3.How long is the Mekong river?

->What's the length of the Mekong river?

4.there/be/post office/here/?

Is there any post office here?

5.could/tell/how/get/supermarket/please/?

Could you tell me how to get to the supermarket please?

6.What do you think Nam is doing?

He is telling the truth to his parents.

7.What is your vacation plan now?

I am going to spend 2 weeks on a farm.

8.Did you make a decision go to Nha Trang? DECIDE

9.The energetic boys often play soccer. ENERGY

wut

LOL what a loser

me is "hạng 3' :">

không, biết nước chúng nó troll mình rồi thì chết sao được

nhọ thế

tui nè ( tui bật video walkthrough xem biết trước rồi mới chơi -ăn gian ):))

Câu này dễ 

Các ước của a là 5;13;1;65

hoặc thế này

Với x>_5=>x-5>_0=>/x-5/=x-5

=>x-5=x+3

=>x-x=5+3

=>0=8

=>Vô lí

Với x<5=>x-5<0=>/x-5/=5-x

=>5-x=x+3

=>x+x=5-3

=>2x=2

=>x=1

Vậy x=1