单项选择题

In our highly technological society, the number of jobs for unskilled workers is ______.

A．shrinking
B．obscuring
C．altering
D．constraining
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单项选择题
Difficulties and hardships have ______ the best qualities of the young geologist.
A．brought out
B．brought about
C．brought forth
D．brought up
单项选择题
When he tried to make a ______ , he found that the hotel that he wanted was completely filled because of a convention.
A．complaint
B．claim
C．reservation
D．decision
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