38．-Can sixteen-year-olds drive their cars to school?

   -No．They shouldn't                to drive because they are not serious enough．

    A．allow               B．allowed             C．be allowed          D．have allowed

37．-I think science is more useful than art．

   -I disagree．I think art is               science．

A．not so useful as     B．less useful than      C．the most useful of         D．as useful as

36．-Can you tell me                you have been collecting shells?

   -Since I was seven years old．

    A．how long           B．how old           C．how far             D．how many

35．-Must I get up before six o'clock tomorrow morning, dad?

   -No, you            ．Tomorrow is Saturday．You may get up later．

    A．mustn't             B．can't                       C．needn't              D．may not

34．While the boy              down the street, the UFO landed．

    A．had walked          B．was walking         C．has walked          D．is walking

33．She is going to be a reporter when she              up．

    A．grows             B．will grow           C．is going to grow   D．grew

32．Many kinds of wild animals are      ．We must do something to save them．

    A．in fact             B．on holiday          C．on time            D．in danger

31．If you have finished your homework, you should            washing and cooking．

    A．look through        B．help with           C．take after                   D．thank for

30．-Could you please               when you go out? It smells terrible in the room．

   -Sure．But where should I put it?

    A．take out the trash          B．sweep the floor     C．turn off the light   D．fold the clothes

29．The library assistant says I can                the magazine for two weeks．

    A．borrow             B．lend              C．buy                 D．keep