and you didn't notice anything unusual?____not.1 certainly 2 surely 3 doubtlessly 4 truly选择哪一个,及分别说出为什么

and you didn't notice anything unusual?____not.1 certainly 2 surely 3 doubtlessly 4 truly选择哪一个,及分别说出为什么
and you didn't notice anything unusual?____not.1 certainly 2 surely 3 doubtlessly 4 truly
选择哪一个,及分别说出为什么

and you didn't notice anything unusual?____not.1 certainly 2 surely 3 doubtlessly 4 truly选择哪一个,及分别说出为什么
1 Certainly not.
表示否定或拒绝,意为:当然不是;当然不行;那可不行
另外几个都是表示肯定的,意思是的,不与否定的回答not连用,
即没有加 not 这个用法