Hệ thống như cái quanque z :))

haven't seen

were sleeping

cooking 

took

anh hùng cào phím :))

Phong is going to stay in a hotel. 

We are going to eat seafood.

D

B

C

He got a bad mark because he was lazy

I went to school on time. Although, it rained hard yesterday

If we use cars all the time, we will make the air dirty

D

A

D

... watching television

... in the world is longer than the Nile

... be able to go to the Moon for our summer holidays in 2050

... very well