（    ）51．A．machine         B．radio               C．TV               D．phone

（    ）50．A．what            B．where             C．when              D．why

（    ）49．A．hard             B．simple             C．difficult            D．easy

（    ）48．A．call him                B．call them          C．give it              D．give them

（    ）47．A．look            B．stay               C．make              D．keep

（    ）46．A．what            B．how             C．which               D．that

（     ）45．While the teacher ________, the students ________ notes.

    A．was talking; took                               B．was talking; were taking

    C．talked; took                            D．talked; were taking

    通读下面短文，掌握其大意，然后在各小题所给的四个选项中，选出一个最佳答案，并将其字母编号写在题号前的括号内。

    I got an answering machine for my birthday，and I soon got to know  46  a useful machine this is．I 47  outside most of the day，So someone can leave a message and I can  48  back．

    There is no way for those who call me to say that they can’t find me．So it will be  49  for them to get in touch with me．Sometimes  50  I am at home and have work to do，the 51 never stops. I like to put the machine on. I am not tired, and I can do   52  work. There are some people I just do not want to  53 . So I put the machine on and I  54  speak to them. It is so useful and helpful that I really do not know how I   55  this wonderful invention.

（     ）44．There are ________ mistakes in his writing that it's hard to correct them all.

    A．so much            B．so many            C．so few               D．such many

（     ）43．The number of the seats in the room ________ about sixty.

    A．has been            B．are                C．is                 D．be

（     ）42．-- ________ does Jim listen to the news?

           --Every evening.

    A．How many            B．How long             C．How soon            D．How often