---So you haven't read the information form?---_________makes the matter worse is that I don't have a single copy．A.ItB.WhatC.ThatD.Which
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B解析主要测试主语从句。由的语境可知句子---_________makes the matter worse 中需要主语，同时该句子还充当了后面句子is that I don't have a single copy的主语，双重作用，结合