24、Companies are struggling to find the right ________ between supply and demand, but it is no easy task．

A．balance           B．process        C．equality           D．pattern（C）

22、The woman scientist was so busy that she could hardly       time to her children．

A．spend          B．devote        C．offer         D．provide

21、      in the city for thirty years, the old man moved back to the countryside．

A．Having worked        B．Working         C．To have worked         D．To work

20、My mother made a promise        I passed the examination, she would buy me an MP4．

A．that         B．that if          C．if that          D．whether

19、--- I’ve told her many times, and she still forgot about it!

--- I understand．It’s true that she         be very forgetful sometimes．

A．can          B．would           C．should          D．must

18、She thought         impossible to finish so much work in a day．

A．this         B．that           C．its          D．it

17、It is becoming more and more difficult to       the problems of traffic in some big cities of our country．

A．deal with         B．set up         C．put away         D．break down

16、--- Why don’t you drive your own car?

--- It        at a repair shop．

A．has repaired                                               B．is repaired

C．is being repaired                                         D．will be repaired

15、Several students in our class are considering       to the United Kingdom for further study next year．

A．going     B．to go        C．go           D．gone