单项选择题

The school's development committee has deliberated the question ______ great length.

A．on
B．along
C．at
D．for
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单项选择题
There's been so little rain, the forest is ______ to go up in flames at any moment.
A．precarious
B．feeble
C．convenient
D．liable
单项选择题
When import taxes on goods arc high, there is a greater chance that they will be ______.
A．bartered
B．counterfeited
C．manufactured
D．smuggled
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