It's hard to concentrate when you're tired.
A.It’s harder to concentrate, you are more tired.
B.The more tired are you, the harder it is to concentrate.
C.You are more tired, you are hard to concentrate.
D.The more tired you are, the harder it is to concentrate.

It's still cold, but it was colder yesterday.
A.
B.It isn't as cold as it was yesterday.
C.It is as warm as it was yesterday.
D.It wasn’t as cold as it is today.

Our neighbours have lived here for quite a long time, but we've lived here longer.
A.Our neighbours haven't lived here as long as us.
B.Our neighbours have lived here longer than we have.
C.
D.We’ve live here for more time than our neighbours.

Karen's hair isn't as long as it used to be.
A.
B.Karen has longer hair now.
C.Karen’s hair is the same as it used to be.
D.Karen used to have longer hair.

There are fewer people at this meeting than at the last one.
A.There aren't as many people at this meeting as at the last one.
B.There was as many people at last meeting as at this one.
C.There are more people at this meeting as the last one.
D.There wasn’t as many people at the last morning like at this meeting.

The children are excited with the difficult games.
A.The children are less excited when the games are difficult.
B.The more difficult the games are, the more excited the children are.
C.
D.The more the games are difficult, the more the children are excited.

This sofa is less comfortable than that one.
A.That sofa isn’t more comfortable than this one.
B.This sofa is as comfortable as that one.
C.That sofa is more comfortable as this one.
D.This sofa isn’t as comfortable as that one.

The red book is as expensive as the white one.
A.The red book is the same price as the white one.
B.The white book is the same price like the red one.
C.The red book isn’t so cheap as the white one.
D.The red book is cheaper than the white one.

Minh is the most intelligent student in my class.
A.Students in my class is more intelligent than Minh.
B.No one in my class is more intelligent than Minh.
C.Minh is more intelligent than some students in my class.
D.No one in my class is intelligent as Minh.

I was a bit nervous before the interview yesterday, but usually I’m a lot nervous.
A.I wasn’t as nervous before the interview yesterday as I usually am.
B.I am usually a bit more nervous before the interview.
C.I am as nervous before the interview as I was yesterday.
D.I felt nervous before the interview as usual.