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
His body temperature has been ______ for 3 days, the highest point reaching 40.5 degree centigrade.
A. uncommon
B. disordered
C. abnormal
D. extraordinary
单项选择题
We work to make money,but it's a ______ that people who work hard and long often do not make the most money.
A. dilemma
B. conflict
C. prejudice
D. paradox
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