单项选择题

Some younger workers assume older workers can't keep __ with fast-changing technology and business pressures.

A．pace
B．step
C．progress
D．touch
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单项选择题
Some people wait for__ to come knocking. Some people sought it out.
A．necessity
B．opportunity
C．reality
D．probability
单项选择题
He felt a bit ___ because her life seemed completely out of balance.
A．depressed
B．suppress
C．thoughtful
D．weakness
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