28．The teacher asked me ______ late for school again．

  A．don’t be    B．to be    C．not to be    D．to not be

27．Our teachers are very friendly ______ all of us．

  A．to    B．for    C．at    D．with

26．Please stop ______!Let’s listen to our teachers!

  A．to talk    B．talked    C．to talking    D．talking

25．---How long have you ______ here?---For 3 hours．

    A．come    B．came    C．been    D．Came in

24．Rober spends much time  ______ books．

  A．on reading    B．reading    C．seeing    D．looking

23．--- ______ do you usually go to see your uncle?---Twice a month．

  A．How often    B．How long    C．How    D．How far

22．Could you close the door now？Everybody ______．

  A．comes    B．came    C．has come    D．hasn't come

21．Thanks for ______ me with my homework．

  A．help    B．helped    C．helps    D．helping

20．Who knows how to read and write，Mary or Kitty？

    A．Both Mary and Kitty    B．Either Mary or Kitty    C．Neither of them

19．Kitty knew how to read．didn’t she？

    A．Yes，she didn’t    B．No，she did    C．No，she didn’t