playing => play

between => near

want => like

bỏ cost vì đã có how much

so => because

Her mother and she walk to school in the morning

-> Her mother and she go...to school on foot in the morning........

What's your brother's weight ?

->How...............heavy is your brother......................?

This building belongs to my brother.

->This is..................my brother's building ...........

What time does Mai go to work?

-> When.............does Mai go to work?..........

How high is the Mount Everst?

-> What............is the height of the Mount Everst.............?

1. Did you see the latest Batman film last week?
2. My mother likes to cook and dance

a: 

b: 

c: 

d: 

=>

=>

e: 

=>

=>

Gọi d=ƯCLN(2n+5;2n+1)

=>

=>

=>

mà  và 2n+5 lẻ

nên d=1

=>ƯCLN(2n+5;2n+1)=1

=> là phân số tối giản