Are they working near the house?

________.

[　　]

A．Yes, there are

B．No, there isn't

C．No, there aren't

D．Yes, they are

What are you doing?

________.

[　　]

________ ,are you Mr Li?

[　　]

A．Hello

B．Excuse me

C．Sorry

What's this?

________.

[　　]

A．This's “R”

B．It's here

C．It's “R”

The world's population will be much ________ than ________.

[　　]

A．more, today's

B．larger, today's

C．more, today

D．larger, today

I'm ________ tired that I can't walk on.

[　　]

________ he is young, he knows a lot.

[　　]

You have read ________ books.

[　　]

________ you are not feeling well, ________ better stay at home.

[　　]

It is ten years ________ we left school.

[　　]