It took her only 20 minutes _____ (win) first prize.为什么是to win——(final),we passed the exam successfully.为什么用finally?

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It took her only 20 minutes _____ (win) first prize.为什么是to win——(final),we passed the exam successfully.为什么用finally?
It took her only 20 minutes _____ (win) first prize.
为什么是to win
——(final),we passed the exam successfully.为什么用finally?

It took her only 20 minutes _____ (win) first prize.为什么是to win——(final),we passed the exam successfully.为什么用finally?
1、动词不定式to do 来表示目的.我花了20分钟才赢了一等奖.
第二种理固定句式:it takes sb some time to do sth.

take sb. a period of time to do sth.
take 这个动词后面要接的介词短语就是to do. 固定搭配。
要是spend的话,就要说 She spent only 20 min on winning first prize.——(final),we passed the exam successfully.为什么用finally?我觉得啊,这个相...

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take sb. a period of time to do sth.
take 这个动词后面要接的介词短语就是to do. 固定搭配。
要是spend的话,就要说 She spent only 20 min on winning first prize.

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take+时间+to do
一般的用法
finally是副词,做状语,这里应该是时间状语。
英文主要还是看外国人的一般用法,听多了自然就熟悉了。
个人觉得语法就是个参考,只是对语言习惯的描述。