单项选择题

The mountainous areas of the country are ______ populated.

A．infrequently
B．sparsely
C．slightly
D．loosely
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单项选择题
The teacher gave the students extra work because she was ______ by all the noise and talking in the classroom.
A．interrupted
B．degenerated
C．terminated
D．exasperated
单项选择题
Human facial expressions differ from those of animals in the degree to which they can be ______ controlled and modified.
A．deliberately
B．delicately
C．definitely
D．defectively
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