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题型：单选题题类：常考题难易度：普通

高中英语人教版必修五Unit 1 Great scientists同步练习

Only when I left my parents for Italy ________ how comfortable it was to live in our home country.

A、I realized B、I had realized C、did I realize D、had I realized

举一反三

Only after my friend came,____________.

With the third wave of education and future application of AI ________ the shift in how workers see learning throughout their life.

So difficult _____ it to make such great progress without the help of his deskmate that he was close to giving up.

Only in this way ____ expect to get over so many difficulties.

Not until the early years of the 19^th century what heat is.

______ you eat the correct foods ______ be able to keep fit and stay healthy.

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