◎ 题干
To our disappointment, it was _____ made him so upset_____ wasn't known by us.
[     ]
A. that; that
B. what; that
C. what; who
D. that; who
◎ 答案
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◎ 解析
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◎ 知识点
    根据魔方格专家分析,试题“To our disappointment, it was _____ made him so upset_____ wasn't known by us.[ ]A. that; thatB. what; thatC. what; whoD. that; who…”主要考查了你对  【表语从句】【强调句】  等知识点的理解和应用能力。关于这些知识点的“档案”,你可以点击相应的链接进行查看和学习。