问题描述：
Are you free tomorrow? No I won't have a day ……
Are you free tomorrow? No I won't have a day _______untial Sunday.
A.on B.out C.off
应该选C have a day off 有一个假日
Are you free tomorrow? No I won't have a day _______untial Sunday.
A.on B.out C.off
应该选C have a day off 有一个假日
问题解答：
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