请教几道英语单选题目：

请教几道英语单选题目：
22.The museum is _____ a rare collection of coins.
A.displaying
B.exhibiting
C.presenting
D.giving
28.A ___ reduction in reaction time will occur if a senior doesn't stay in activity.
A.clear
B.obvious
C.beautiful
D.striking
29.The survival __________ of some wild animals is not very high as they are often killed for their skins.
A.rate
B.degree
C.ratio
D.scale
36.After a short holiday,he ___ himself once more to his studies.
A.applied
B.converted
C.engaged
D.exerted
43.____ the calculation is right,scientists can never be sure that they have included all variables and modeled them accurately.
A.Even if
B.As far as
C.If only
D.So long as
52.Many old readers do not like the modern _______ of The Holy Bible.They've got used to King James'.
A.publication
B.vision
C.version
D.copyright
53.The investigation (调查) demonstrates that his enemies ________ false stories about him.
A.encouraged
B.caused
C.inspired
D.enlightened
55.The country's first act would be to ____ for the navy.
A.employ
B.invite
C.recruit
D.supply
60.Most broadcasters believe that TV has been unfairly criticized and argue that the power of the medium is ________.
A.granted
B.remedied
C.implied
D.exaggerated
62.In the ________ of the project not being a success,the manager stand to lose up to $30 million.
A.face
B.time
C.event
D.course
63.Living in the western part of the country has its problems,________ obtaining fresh water is not the least.
A.which
B.with which
C.for which
D.of which
64.You ________ him so closely; you should have kept your distance.
A.shouldn't have been following
B.shouldn't follow
C.mustn't follow
D.couldn't have been following
65.I think I was at school,________ I was staying with a friend during the vacation when I heard the news.
A.and then
B.or else
C.or so
D.even so
66.The professor could hardly find sufficient grounds ________ his arguments in favour of the new theory.
A.to be based on
B.to base on
C.on which to base
D.which to base on