单项选择题

The leaves have been swept into huge (heaps).

A．loads
B．layers
C．pyramids
D．piles
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单项选择题
They have the (capability) to destroy the enemy in a fewdays.
A．possibility
B．necessity
C．ability
D．probability
单项选择题
Only a small minority of the mentally ill are (liable) toharm themselves or others,
A．easy
B．possible
C．likely
D．difficult
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