专四

单选题 Retirement is obviously a very complex __________ period; and the earlier you start planning for it, the better.

A.transition
B.transaction
C.transmission
D.transformation

参考答案:A进入在线模考


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2根据下面材料,回答题.


When a snake meets a potential enemy, its primary device is

A.avoiding any observation.
B.finding a safe shelter.
C.giving a warning threat.
D.starting a quick attack.

3 By "dispense with all the preliminaries" (Line 7, Para. 1), the author most probably means that

A.the snakes combine all the previous three steps.
B.the snakes give up all the previous three steps.
C.the snakes follow all the previous steps one by one.
D.the snakes reverse the order of all the previous steps.