单项选择题

Initially. the scientists and engineers seemed ______ by the variety of responses people can make to a poem.

A．depressed
B．embarrassed
C．bewildered
D．reinforced
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单项选择题
In the study, researchers succeeded in determining how coffee ______ different areas of the brain in 15 volunteers.
A．motivated
B．activated
C．illuminated
D．integrated
单项选择题
Grey whales have long been ______ in the north Atlantic and hunting was an important cause for that.
A．deprived
B．extinct
C．detained
D．extinguished
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