单项选择题

If a substance is dissolved in water or heated, it may()a gas.

A. give into
B. give over
C. give off
D. give away

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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
单项选择题
But the Swiss discovered long years ago that constant warfare brought them suffering and poverty.()

A. anything but
B. nothing but
C. none other than
D. no more than
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