33．Although they are tired, they still go on ______.

　　　　　　　 A. working　　　　 B. to work　　　　　　 C. work　　　　　　　　 D. worked

32．-Do you know __________ since 2007?

　 -Let me see, oh about 1,700 words.　

　　　　　　　 A. how many words have we learned　　　　 　 　　 B. how many words do we learn

　　　　　　　 C. how many words we have learned 　　　 　　　　　　 D. how many words we learn

31．My parents often tell me _____ computer games a lot because it's bad for my eyes.

　　　　　　　 A. don't play　　　 B. not play　　　　　　 C. not to play　　　　　 D. to not play

30．-Your bedroom is very clean and tidy.

　　 -Thank you ! It ______ every day .I like doing some cleaning.

　　　　　　　 A. cleans　　　　 B. is cleaned 　　　　　C. cleaned　　　　　　 　D. was cleaned

29．-Hi, Jim. _________ you come to play basketball with me?

　　 -Sorry, I can’t. I have a lot of homework to do.

　　　　　　　 A. May 　　　　B. Must　　　　　　　　 　　 C. Can　　　　　　　　　　　　 　 D. Need　

28．You ________ a mistake if you are not careful enough in your study.

　　　　　　　 A. make 　　　　 B. made　　　　　　 C. is making　　　　　　　　　 　 D. will make

27．-Where is your mother, Mike?

　　 -She _______________to the supermarket. She will come back soon.

　　　　　　　 A. has gone　　　　　 B. went　　　　　　　　　　　　 C. has been 　　　　　　　　 　D. will go

26．- Look! What is Peter doing now?

　 -He _____ for the bus. Let's say "Hello" to him.

A. waits　　　　　 B. will wait　　　　　 C. is waiting　　　　　　　　　 　 D.has waited

25．My family went to the Summer Palace and we _____ a great time there.

　　　　　　　 A. have 　　　　　　　 B. are having　　　　　　　　 C. will have　　　　　　　　　 D. had