单项选择题

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
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单项选择题
Unless ______ by credit card, please pay in cash.
A. pay
B. is paid
C. paying
D. paid
单项选择题
In no country ______ Britain, it has been said, can one experience four seasons in the course of a single day.
A. other than
B. more than
C. better than
D. rather than
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