D) contamination
注:2道理科题;2道文科题;1道环保题。
51. There is much I enjoy about the changing seasons, but my favorite time is the ______ from fall to winter.
A) transmission
B) transformation
C) transition
D) transfer
注:1. transmission 广播电视节目的传送;疾病的传播;文化的传递
2. transformation 变革
3. transition 季节的过度,时间的更替,社会制度的转型
4. transfer 转学,调任工作
52. I think we need to see an investment ______ before we make an expensive mistake.
A) guide
B) entrepreneur
C) consultant
D) assessor
注:consultant 顾问
53. The ______ on this apartment expires in a years time.
A) treaty
B) lease
C) engagement
D) subsidy
注:lease 租约
54. The elderly Russians find it hard to live on their state ______.
A) pensions
B) earnings
C) salaries
D) donations
注:pensions 养老金
55. There is supposed to be a safety ______ which makes it impossible for trains to collide.
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