问题
选择题
My parents live in a small village.
They always keep candles in the house _____ there is a power out. [ ]
A. if
B. unless
C. in case
D. so that
答案
答案：C
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My parents live in a small village.
They always keep candles in the house _____ there is a power out. [ ]
A. if
B. unless
C. in case
D. so that
答案：C