A. join; join in B. join; join C. join in; join in D. join in; join

( ) 12. She is________careful as me, but I'm________ than you.

A. as; much careful B. as; much more careful

C. so; more careful D. so; very careful

( ) 13. -What should we do to reduce(减少) food waste?

　　-In a restaurant only order as ________as we need and try to eat it up. A. much B. many C. more D. most

( ) 14. -Don't forget to turn off the lights if you are the least one to leave. -________. A. I don't know B. I won't C. Me too D. I will

( ) 15.Boys, don't lose________ in playing Angry birds. It is bad for your eyes to play computer games for a long time.

A. himself B. yourself C. themselves D. yourselves

( ) 16. The book is________. I wrote________ name on its cover for________.

A. my; my; myself B. mine; my; myself

　　C. mine; myself; my D. myself; mine; my

( ) 17. Tell me that before you________ the USA.

A. go back to B. return back to

　　C. return D. go back

( ) 18. -Dad, when will you be free? You agreed to go to the seaside with me two days ago.

　　-I'm sorry, Jean. But I think I'll have a ________ holiday soon.

A. four-days B. four-day

　　C. four days D. four day

( ) 19. -Why don't you________ us to Huai'an? -That's a good idea.

A. join B. join in C. joining D. joining

( ) 20. I hope Sandy________ to my birthday party next Wednesday.

A. to come B. come C. coming D. can come

( ) 21. Today it is becoming more and more important for students to learn to teach________.

A. himself B. themselves C. him D. them