题目内容
Only when ________ be possible to sign the papers.
| A.does the boss come will it | B.the boss comes will it |
| C.has the boss come it will | D.the boss comes it will |
B
Only加when引导的时间状语从句位于句首构成部分倒装,根据规则主句倒装,从句不变,因此选B.
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