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

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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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