—Don’t throw paper on the ground, please.

—______.

A. It doesn’t matter　　　　　　　　　　 　 B. I’m sorry

C. Excuse me　　　　　　　　　　　　　　　　 D. That’s all right

He thought that computers would never be ______ most people .

A. used  by     B. used for     C. useful by    D. using for

 What _______ you _________at this time yesterday ?

A. did; do   B. have; done   C. were ;doing   D. are ; doing

My uncle _______ in this school since 1980 .

A. is teaching  B. was teaching   C. will teach   D. has taught

Li Lei’s never been to Australia before , ________?

A. is he      B. has he      C. isn’t he      D. hasn’t he

When I got home ,mother _________in the kitchen.

A. cooking     B. was cooking     C. cooked     D. is cooking

----Where is Mr Green ?

----He ________Japan. He’ll be back next Sunday .

A.has gone to B. has been to C.won’t go to D.hasn’t been to

Why don’t you ________to sing English songs ?

A. to learn     B. learning    C. learn      D. learned

------ Would you mind helping me ?

------ ___________.

A. Yes， I would　 　　　　　　B. No, I wouldn’t

C. Yes ,no problem　　　　　　 D. Not at all

I have been ________ for two hours.

A. skate      B. skating      C. to skate      D. skates