单项选择题

Good lighting in factories leads to greater comfort, higher ______ and productivity.

A．work
B．proficiency
C．craft
D．efficiency
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单项选择题
The workers ______ approved of the government's policy.
A．mostly
B．freely
C．unhappily
D．angrily
单项选择题
Some people say that students' progress in school is ______ by environment.
A．effected
B．affected
C．offered
D．afforded
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