25. --Hurry up. The bus is coming.

   --Oh, no. We mustn't cross the street______ the traffic lights are green.

   A. after                          B. since                 C. while                D. until

24. ---It’s a bit cold. Would you mind my       all the windows?

   --- Do as you like, please.

   A. open                          B. opening             C. close                 D. closing

23. --- What were you doing at 7 last evening ?

   --- I ____ TV with my sister at home.

   A. watch                       B. watched         C．was watching   D．were watching

22. ---You look sad, Kate.  ---Yeah. I have made _______ mistakes in my report.

   A. few                           B. a few                C. little                 D. a little

21. ---Are the two sisters poor?    --- No, ____of them have their own cars.

   A. both                      B. all                 C. each               D. either

20. This famous tower has a long history. It _______ more than 300 years ago.  

   A. builds                    B. built                C. be built             D. was built

19. --- What ____ your son _____ for breakfast this morning?

   --- An egg , two pieces of bread and a glass of milk. 

   A. do, have                  B. does, have      C. did, has          D. did, have

18．--- May I use this computer?  --- Sorry, you ____. It doesn’t work.

   A. must                     B. can               C. can’t               D. needn’t

17. I like Hainan because I like places where it's not _____ in winter.

   A. cold                       B. hot                C．cool              D. warm

16．The book is mine. I’ve written ______ name on _____ cover myself.

   A. my, it                    B. my , its            C. mine , it        D. mine , its