单项选择题

We've seen a marked shift in our approach to the social issues．

A．clear
B．regular
C．quick
D．great
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单项选择题
In the process，the light energy converts to heat energy．
A．reduces
B．changes
C．leaves
D．drops
单项选择题
I want to provide my boys with a decent education．
A．good
B．special
C．private
D．general
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