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一、it用作代词1.指代事物或前面提到过的事物。例如:——What's in the picture?图片里画的是什么?——It's a cat.是一只猫。It's the wind shaking the door.风刮得门响。
First, it used as a pronoun 1 refers to things or things mentioned earlier. For example: - What's in the picture? What's in the picture? - It's a cat. It's the wind shaking the door.