In order to save the energy, we should ________ lights in time if we don’t need

In order to save the energy, we should ________ lights in time if we don’t need them.

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This is one of the highest buildings that ________ in our city recently.

This is one of the highest buildings that ________ in our city recently.

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This is one of the best films ________.

This is one of the best films ________.

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Chinese spacecraft Chang’e 5 ______ into space on November 24th, 2020.

Chinese spacecraft Chang’e 5 ______ into space on November 24th, 2020.

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已知椭圆的焦距为 4, 其短轴的两个端点与长轴的一个端点构成正三角形.

已知椭圆的焦距为 4, 其短轴的两个端点与长轴的一个端点构成正三角形.

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