问题
选择题
— Your aunt often walks the dog in the morning.
— Yeah, bad weather stops her.
A．when
B．unless
C．because
D．since
答案
答案：B
题目分析：句意：你的姑姑经常在早晨遛狗。是的，除非坏天气阻止了她。when 当……的时候；unless 除非； because因为；since自从。所以选B。
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