问题描述：
单项选择：That's a ( ) river and we can't swim acorss it.
That's a ( ) river and we can't swim acorss it.
A.100-foot-wide
B.800-foot-wide
C.100-feet-wide
D.800-feet-wide
为什么选A而不选B?
That's a ( ) river and we can't swim acorss it.
A.100-foot-wide
B.800-foot-wide
C.100-feet-wide
D.800-feet-wide
为什么选A而不选B?
问题解答：
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