单项选择题

This is a ______ job. You need to be trained.

A．skillful
B．skilled
C．competent
D．competitive
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单项选择题
Many scientists remain ______ about the value of this research program.
A．spacious
B．stationary
C．specific '
D．skeptical
单项选择题
You would be ______ a risk to let your child go to school by himself.
A．omitting
B．attaching
C．affording
D．running
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