单项选择题

In this passage, the author tells us ______.

A．how to make the workers more productive
B．possible factors leading to greater efficiency
C．to a certain extent more money lead to greater productivity
D．how to make workers' jobs more interesting

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单项选择题

According to the passage, why do workers want more money

A．Because their jobs are too boring.
B．Because they want to enjoy more spare time.
C．Because they want to make their jobs more interesting.
D．Because they demand shorter working hours.

单项选择题

The author of this passage is probably a ______.

A．teacher
B．worker
C．manager
D．physicist