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24.(    ) I've been skating (    ) nine o'clock .

A.  for  B. over  C. since  D. at

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23.(    ) How long (    ) yesterday ?

A. have you sleeping  B. do you sleep 

C.did you sleep  D. did you asleep

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22.(   ) I'd like (   ) envelopes  because they are interesting .

A.to store  B. storing  C. store  D. stored

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21.(   ) He has been watching English movies (    )about two months .

A. since  B. for  C. in   D. during

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20. -How are you getting on with your work?

      -I can’t do it _________ any longer, I’ll have to get help.

       A. singly     B. quietly     C. alone      D. hard

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19. -We are free this afternoon. Let’s go to play computer games.

     -Well, I think I’d better watch an English program ________.

      A. too     B. either     C. then      D. instead

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18. -Can I try it on?   -I’m ____________ you can.

      A. sure       B. be sure        C. make sure     D. surely

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17. I can _________ swim _______ skate. Will you please teach me?

      A. either …or       B. not only…but also

      C. both …and       D. neither …nor

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16.(    ) The foreign visitors have been in Nartony for _________ three weeks.

      A. more than      B. than     

C. more      D. more and more

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15. Our classroom _____ every day, so it’s very clean.

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

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