56、 Modern means of communication prove to be very convenient for researchers to be kept __________in‘their respective field．
A．known
B．informed
C．noticed
D．told


57、 A camera takes light rays bounced off objects and__________them on a sheet of a film．
A．concentrates
B．mixes
C．combines
D．focuses


58、 Are you__________ spending more money on the space program?
A．in favor of
B．by favor of
C．in favor to
D．out of favor


59、 Professor Wang，__________ for his informative lectures，was warmly received by his students．
A．Knowing
B．Known
C．to be known
D．having known

60、 The goals__________ he had fought ail his life no longer seemed important to him.
A．after which
B．with which
C．for which
D．at which


61、 In all，6 000 companies are __________ in producing the parts that are needed for these aircraft．
A．eoncemed
B．recommended．
C．involved
D．offended

62、 He looks as if he__________ nothing about the news．
A．Would kno
B．would have known
C．knew
D．should know


63、 __________ the interference from the local residents，the delegation would have caught the train bound for Edinburgh．
A．Due to
B．Except for
C．In caffe of
D．But for


64、 The government is trying to do something to__________ better understanding between the two countfies．
A．raise
B．promote
C．heighten
D．increase


65、 None of US expected the chairman to__________ at the party．We thought he was still in hospital．
A．turn in
B．turn over
C．turn up
D．turn down