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It’s a ball.
What’s that?
It’s a book.
What’s this?
It’s a bike.
What’s that?
It’s a car.
What’s that?
that 用于指时间空间上较远的事物
this 用于指时间空间上较近的事物
What do you see in the sky?
I see a plane in the sky.
What do you see in the sky?
I see a bird in the sky.
What do you see in the sky?
I see a kite in the sky.
What do you see in the sky?
I see a balloon in the sky.