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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
2025-03-01
40
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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
考查连词辨析。句意:总体来说,蛇是不会攻击人类的,除非它们受到了危险的威胁。unless意为“除非,如果不”,相当于if not,引导条件状语从句,与句意和句法结构相符,故答案为C。if引导条件状语从句,与unless意思相反;since引导时间状语从句或原因状语从句;while引导时间状语从句,这三项均不符合句意和句子逻辑,故排除。
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