单项选择题

In case of something unexpected, it is advisable to ______ your life against accident.

A. insure
B. ensure
C. assure
D. be sure
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There are lots of trees ______ the river.
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B. in either sides of
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单项选择题
______ hold the VIP card will be free of charge for this service.
A. People
B. Those people
C. Those ones
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