请问这题为什么不能选A?10.the secretary worked late into the night ,___a long speech for the president.A to prepare B preparing C prepared D was preparing选B不定式和粉刺都可以表示状语吧?to do 可以做目的状语吧?整夜忙

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请问这题为什么不能选A?10.the secretary worked late into the night ,___a long speech for the president.A to prepare B preparing C prepared D was preparing选B不定式和粉刺都可以表示状语吧?to do 可以做目的状语吧?整夜忙

请问这题为什么不能选A?10.the secretary worked late into the night ,___a long speech for the president.A to prepare B preparing C prepared D was preparing选B不定式和粉刺都可以表示状语吧?to do 可以做目的状语吧?整夜忙
请问这题为什么不能选A?
10.the secretary worked late into the night ,___a long speech for the president.
A to prepare B preparing C prepared D was preparing
选B
不定式和粉刺都可以表示状语吧?to do 可以做目的状语吧?整夜忙碌工作,目的是为了…… 为什么不能用to do呢?

请问这题为什么不能选A?10.the secretary worked late into the night ,___a long speech for the president.A to prepare B preparing C prepared D was preparing选B不定式和粉刺都可以表示状语吧?to do 可以做目的状语吧?整夜忙
如果没有那个逗号就可以选A,表目的
有了逗号就得看做两个部分,后面用现在分词引导,补充说明目的

有逗号了,to do不定式是要连在句子里的,不能分句。

不要中间那个逗号,就能用to do了。