首先你的单词打错了,应该是 manuscript "手稿"的意思
答案应该是A
首先手稿是被写的,所以应该用被动语态,再一个不定式to后面接动词原形,所以C错了
这个动作已经在过去被完成了,所以用不定式的完成式,故答案是A
答案D是一个非谓语动词的一种形式.叫做现在分词的完成式,它一般位于句首做时间状语,相当于after引导的一个时间状语从句
After he finished his homework,he went home.
= Having finished his homework,he went home.