41、 __________work has been done to improve people' s living standard.
A．Many
B．A great many
C．A large number of
D．A great deal of


42、 The children will have to__________their play-time hours when school opens.
A．cut in
B．cut up
C．cut on
D．cut down


43、 This kind of work is __________ me.
A．unfamiliar with
B．unfamiliar by
C．unfamiliar to
D．not unfamiliar of


44、 As we know, physics __________ the science of energy.
A．was
B．were
C．is
D．are


45、 The quality of this kind of computer is__________to that of imported computers.
A．worse
B．inferior
C．indifferent
D．much better


46、According to the American federal government, residents of Hawaii have the longest life__________.
A．scope
B．rank
C．span
D．scale


47、 I didn' t know what to do but then an idea suddenly __________me.
A．happened to
B．entered
C．occurred to
D．took place


48、 He didn't know I was in his office. He was too busy to __________me.
A．pay attention to
B．notice
C．know
D．realize


49、 __________student with a little common sense should be able to answer the question.
A．Each
B．Either
C．Any
D．One


50、 That' s the reason __________Ann could not do her part of the job.
A．that
B．of
C．because
D．why

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