问题
选择题
This is river. Few of us can swim it, I think.
A．a 800-foot-wide; over
B．an 800-foot-wide; across
C．a 800-feet-wide; over
D．an 800-feet-wide; across
答案
答案：B
根据800的发音，可知用冠词an，故将A，C排除，同时在有连字符的情况下，名词foot不能用复数形式，故选答案为B