Has your father finished his new novel yet?I don't know,he ____it yesterday evening.A.wroteB.has writtenC.had writtenD.was writing为什么用过去进行时?yesterday evening不是“昨天晚上”吗,只一个晚上,是个时间段吧,过去进行

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Has your father finished his new novel yet?I don't know,he ____it yesterday evening.A.wroteB.has writtenC.had writtenD.was writing为什么用过去进行时?yesterday evening不是“昨天晚上”吗,只一个晚上,是个时间段吧,过去进行
Has your father finished his new novel yet?
I don't know,he ____it yesterday evening.
A.wrote
B.has written
C.had written
D.was writing
为什么用过去进行时?
yesterday evening不是“昨天晚上”吗,只一个晚上,是个时间段吧,过去进行时是要具体时间点吧.
帮我分析下

Has your father finished his new novel yet?I don't know,he ____it yesterday evening.A.wroteB.has writtenC.had writtenD.was writing为什么用过去进行时?yesterday evening不是“昨天晚上”吗,只一个晚上,是个时间段吧,过去进行
说的是father昨天傍晚一直在写那本小说,是过去的一个持续性动作,所以用过去进行时.

语法与时间并不是绝对的要怎样搭配,本句中"写作“是一个较长过程的动作,用过去进行时,很恰当

因为会打折不知道爸爸是否完成,而只知道她爸爸昨晚一直在写,所以用过去进行时,表未知结果