单项选择题

When you get excited, try to hold yourself ______.

A．up
B．down
C．off
D．in
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单项选择题
Born of the same parents, he bears no ______ his brothers.
A．traits with
B．resemblances to
C．personalities between
D．characters among
单项选择题
In almost all chemical-process plants, heat is ______ by burning of fossil fuels—coal, oil, or natural gas.
A．transformed
B．conducted
C．transferred
D．generated
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