单项选择题

The outdated methods of dealing with garbage are now considered unacceptable because of __________.

A．lower efficiency
B．water shortage
C．limited space
D．higher risk

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单项选择题

Transporting the trash to the rural areas is considered as __________.

A．an effective solution
B．a costly solution
C．a dangerous solution
D．a feasible solution

单项选择题

How was garbage usually disposed of during the eighteenth century

A．All the garbage was burned.
B．All the garbage was thrown into the river directly.
C．Most of garbage was recycled.
D．Garbage was transported to a remote dumpsite.

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