单项选择题

When did the third green wave come

A．When environmental concern rises.
B．When advertisers are self-regulating themselves.
C．When advertisements become very regulated.
D．When the mainstream also becomes concerned about it.

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单项选择题

Why do workers want more money

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

单项选择题

The last sentence in this passage means that ff we succeed in making workers' jobs more interesting ______.

A．they will want more money
B．they will demand shorter working hours
C．more money and shorter working hours are important factors
D．more money and shorter working hours will not be so important to them