24、― I don’t think we have met before.    

― Yes, once at a party, but we _______.    

A. didn’t introduce                                           B. weren’t introduced    

C. haven’t introduced                                       D. weren’t introducing    

23、_____ the Hope Project was carried out in this poor area, students here had no access to education.    

A. Once                    B. As              C. Before                 D. After   

22、 _______ around the Water Cube, we were then taken to see the Bird’s Nest for the 2008 Olympic Games.

A. Having shown        B. To be shown           C. Having been shown        D. To show

21、In order not to be disturbed, I spent three hours _______ in my study.

   A. locking          B. locked           C. to lock       D. to be locked

20、 It was a pity that the great writer died________ his works unfinished.

    A. for             B. with             C. from         D. of

19、I don’t doubt           our team will win the 4×100一meter race．

    A．when         B．whether         C．that        D．which

18、--- Can I look at the menu for a few more minutes before I decide?

   ---- Of course._______ sir.

   A. Make yourself at home              B. Enjoy yourself

   C. Take your time                     D. It doesn't matter

17、Some medicine，when wrongly           ，can kill a person

    A．taken          B．taking          C．take        D．to take

16、---You were tired after the 10,000一 meter race．weren’t you?

   --- Yes,           I was out of breath．

    A．not at all      B．not a little       C．not really     D．not a bit

15、 After three months, these young students finally became used to the ______ of life in a big

   city abroad.

   A. speed            B. pace                     C. rate                    D. frequency