题目内容
--- It’s beyond doubt __________ he has paid for the tickets.
--- Of course not! ___________ I have a bad memory.
A. that; If B. whether; If C. that; Unless D. whether; Unless
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题目内容
--- It’s beyond doubt __________ he has paid for the tickets.
--- Of course not! ___________ I have a bad memory.
A. that; If B. whether; If C. that; Unless D. whether; Unless