2. 职称英语
  3. Generally, snakes won’t attack humans______they are threatened with danger.A、if

Generally, snakes won’t attack humans______they are threatened with danger.A、if

游客2024-01-14  53
问题 Generally, snakes won’t attack humans______they are threatened with danger.
选项 A、if
B、since
C、unless
D、while
答案 C
解析 本题考查连词辨析。A项“如果”；B项“自从”，常引导时间状语从句；C项“除非”；D项“当……时”，引导时间状语从句。根据句意，故选C。
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