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
Prof. Lee's book will show you ______ can be used in other contexts.
A．that you have observed
B．that how you have observed
C．how that you have observed
D．how what you have observed
单项选择题
______ that the trade between the two countries reached its highest point.
A．During the 1960s
B．It was in the 1960s
C．That it was in the 1960s
D．It was the 1960s
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