Today more and more families have their own computers.Parents buy computers  21  their children.They  22  computers can help them improve their studies in school.However,many of their children  23  computers to play games,to watch videos  24  to sing karaoke instead of(而不是)studying.So many teachers and parents complain(抱怨)that computers call not help children study  25  make them fall behind.So computers are put away  26  parents.

   In  27  countries,even some scientists also  28  computers.They say computers let many people  29  their jobs or  30  them a lot of trouble(麻烦).

21.A.to          B.on           C.with         D.for

22.A.hope        B.want        C.thinks        D.let

23.A.make        B.get        C.use         D.have

24.A.and         B.or          C.but         D.so

25.A.and         B.or         C.but          D.so

26.A.for          B.by          C.with          D.in

27.A.other some      B.some else       C.else some       D.some other

28.A.like          B.want         C.hate         D.buy

29.A.to lose        B.lose         C.have         D.to have

30.A.take         B.get          C.bring         D.find

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