We must _______ that the experiment is controlled as rigidly as possible.

单选题

We must remember that _____fashion is not the most important thing in _______ life.

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单选题

We must see _____ it that the new policies are implemented.

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单选题

We all know that the front door is the main _______ to the house.

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单选题

We must put our plans into _________ .

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单选题

To fully understand the writer, we must read not only between the lines but also _______ the lines to know what is implied in the article.

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