2. 外语
  3. Air, or ______ is called atmosphere, surrounds the whole earth.

Air, or ______ is called atmosphere, surrounds the whole earth.

admin2019-07-18  41
问题 Air, or ______ is called atmosphere, surrounds the whole earth.
选项 A、it
B、that
C、which
D、what
答案D
解析 本题测试连词的用法。本句为主语从句，what在从句中做主语。
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