--I’m tired of sitting in the classroom all day long.

--Why not consider ________ a rest every one hour?

--- Tom, have you seen your brother?

--- Oh, I saw him ________ basketball on the playground on my way home.

—What's four plus four?  

—_________.

--A lot of people got SARS two years ago. It was terrible.

--Yes. We should ________ ourselves and keep healthy.

--- Could you tell me _________ this camera?

--- Sure. It's very easy.

--- What do you think of the story?

--- It's ________. I don't like it.

--- Would you mind passing me your pen?

--- ________.

--- I don't know_______.

--- You can go and ask Jack.

---When should I hand in my paper?

---Your paper must_____as soon as the bell_____.

-There is something wrong with your hike, _________?

-Yes．I'll have it _________ tomorrow．