问题描述：
After running .she is too tired to walk any____
a.farther b.further c.farthest d furthest
We have setup a lot of highrises in our school_____
a.since five years b.in the past five years c in five years d in 1999
a.farther b.further c.farthest d furthest
We have setup a lot of highrises in our school_____
a.since five years b.in the past five years c in five years d in 1999
问题解答：
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