◎ 题干
Cindy shut the door heavily and burst into tears. No one in the office knew _____ she was so angry.

A. where
B. whether
C. that
D. why
◎ 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“Cindy shut the door heavily and burst into tears. No one in the office knew _____she was so angry. [ ]A. where B. whether C. that D. why …”主要考查了你对  【连接副词】【宾语从句】  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。