问题描述：
【改写句子】
He will not come with us.He should finish his work first.
He will not come with us ___ he ___ his work on time.
until,finishes
before,finishes
unless,finishes
这几个里那些是对的?
He will not come with us.He should finish his work first.
He will not come with us ___ he ___ his work on time.
until,finishes
before,finishes
unless,finishes
这几个里那些是对的?
问题解答：
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