◎ 题干
While flying, a bat makes a sound which hits things and comes back to its ears.
In this way, it's able to know _____ the things are and avoid bumping into them.

[     ]

A. how
B. where
C. what
D. which
◎ 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“While flying, a bat makes a sound which hits things and comes back to its ears.In this way, it's able to know _____ the things are and avoid bumping into them.…”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。