单项选择题

What does the passage mainly talk about

A．The three benefits provided by trees.
B．Trees and soil conservation.
C．The various uses of trees.
D．The different attitudes of the government and the villagers toward trees.

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单项选择题

What is the most important function of trees

A．Providing fuel.
B．Offering shade.
C．Preventing natural disasters.
D．Providing charcoal.

单项选择题

A．availableB．usedC．gotD．estimated

A．available
B．used
C．got
D．estimated