2. 外语
  3. __________(在出现紧急情况时), the first few minutes after you dial 999 are the most critical.

__________(在出现紧急情况时), the first few minutes after you dial 999 are the most critical.

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问题 __________(在出现紧急情况时), the first few minutes after you dial 999 are the most critical.
选项
答案In case of an emergency/When there is an emergency
解析 ①“在……时”in case of或when引导的状语从句；②“紧急情况”emergency。
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大学英语四级

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