Are you positive that there's been no mistake?

admin2020-12-24  22

问题 Are you positive that there's been no mistake?

选项 A:rational       
B:reasonable
C:certain       
D:bound

答案C

解析本句意思:你能肯定没有错误吗?rational意为“理性的”; reasonable意为 “合理的”; certain意为“肯定的”,与positive同义;bound意为“束缚,捆绑”。
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