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Everyone should know ____ to save themselves when a fire breaks out.

A. whether
B. what
C. when
D. how
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科目:初中英语 来源:0101 模拟题 题型:单选题

Everyone should know ____ to save themselves when a fire breaks out.
[     ]
A. whether
B. what
C. when
D. how

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科目:初中英语 来源: 题型:

Everyone should know      to save themselves when a fire breaks out.

  A . whether   B . what   C. when   D. how

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