The experiment can’t have been completed in such a short time,＿＿＿？

A. can it B. was it

C. has it D. is it

 

C

【解析】

試題分析：考查反義疑問(wèn)句。can’t + have done , 反意疑問(wèn)部分常用現(xiàn)在完成時(shí)。有過(guò)去的時(shí)間狀語(yǔ)，則用一般過(guò)去時(shí)。句意：在這么短的時(shí)間內(nèi)試驗(yàn)是不可能完成的，不是嗎？

考點(diǎn)：考查反義疑問(wèn)句

 

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