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As a businessman, he would often stay away from the city for three or four weeks at a (an) ( ).
A、extent
B、stretch
C、expanse
D、range
【正确答案】：B
【题目解析】：本题考查名词辨析。extent：区域(广度，宽度)。stretch：一段时间或路程。expanse：宽阔的区域。range；范围。句意：作为一个商人，他经常一连三四个星期不去城里。