Question

— Your aunt often walks the dog in the morning.
— Yeah,        bad weather stops her.

A．when

B．unless

C．because

D．since

Answer 1

B

试题分析：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。