题目内容

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

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You’d better not leave the medicine ______ kids can get it.

A. even if
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The engineer are so busy that they have zero time for outdoor sports activities, _______ they have the interest.

A. whever
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______ our manager objects to Tom's joining the club, we shall accept him as a member.

A. Unitl
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