单项选择题

During his stay in France, he picked ______ quite a bit of French.

A．on
B．up
C．at
D．over
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单项选择题
His heart was ______ so violently that he could hardly catch his breath.
A．bouncing
B．beating
C．jumping
D．punching
单项选择题
The population of this area is mainly ______ Hispanic- Americans and American Indians.
A．composed of
B．comprised of
C．consisted of
D．constituted of
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