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单项选择 适中0.65 引用5 组卷1036
My parents live in a small village. They always keep candles in the house _____ there is a power out.
A.ifB.unless
C.in caseD.so that
2007·重庆·高考真题
知识点:if (如果)unlessin case (that)so that从属连词目的状语从句 答案解析 【答案】很抱歉,登录后才可免费查看答案和解析!