第六部分：完型填空(第51～65题，每题1分，共15分)
阅读下面的短文，文中有15处空白，每处空白给出了4个选项，请根据短文的内容从4个选项中选择1个最佳答案，涂在答题卡相应的位置上。
51
A.kidneys
B.lungs
C.bones
D.livers
52
A.with
B.without
C.of
D.out of
53
A.increased
B.decreased
C.changed
D.disappeared
54
A.make
B.take
C.try
D.test
55
A.as if
B.as though
C.as far as
D.as soon as
56
A.refer
B.apply
C.lead
D.amount
57
A.effective
B.ineffective
C.expensive
D.inexpensive
58
A.cured
B.to cure
C.being cured
D.having been cured
59
A.many
B.more
C.few
D.fewer
60
A.provided
B.introduced
C.tested
D.tempted
61
A.bring about
B.contributed to
C.promote
D.prevent
62
A.increases
B.reductions
C.creations
D.collections
63
A.developed
B.invented
C.delayed
D.refused
64
A.easy
B.uneasy
C.sure
D.unsure
65
A.with
B.to
C.onto
D.into
