单项选择题

The average income of the people in this small town is ______ in the past three years.

[A] more than doubled
[B] more doubled than
[C] much than doubled
[D] much doubled than

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单项选择题

This cage is too small, and the animals have nothing to do all day but ______ inside round and round.

[A] to run
[B] running
[C] runs
[D] run

单项选择题

All personnel of the company are ______for the retirement plan.

[A] illegible
[B] audible
[C] edible
[D] eligible

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