单项选择题

People protect their environment by ______.

A．cutting down unhealthy trees
B．making changes around the trees
C．cooling and cleaning the air around the trees
D．protecting the environment for trees growth

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热门试题

单项选择题

People who love trees may ______.

A．never cause trees injury
B．damage trees on purple
C．do some harm to trees without knowing it
D．not be aware of which trees are healthy

单项选择题

Which do you think is ______ important, health or wealth7

A．the more
B．more
C．most
D．the most