We _________ in this school for about two years .
A. study                          B. studied                   C. have studied

We already enjoyed               on the farm.
A. work                     B. working        C. worked 

—You must           yourself and keep           .   
—Thank you.
A. look for; healthy         B. look after; healthy  C. look at; health                   

Mr. Smith _______ an hour on this work .
A. spent                     B. took                          C. paid

---My hobby is       old coins, what about you?
---In my free time, I like      in the park.

You aren’t outgoing , so you’d better     others.

look at the lights in our classroom, please go and     .

His first novel       in 2009.

Don’t forget       your homework after you get home.

If it      fine tomorrow，we      a picnic.