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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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

Experiments showed that nondrinkers had __________.

A．higher blood pressure
B．lower blood pressure
C．larger amounts of good cholesterol
D．smaller amounts of good cholesterol