You must look after your______if you want to stay ______.(healthy)

问答题

You must look after your______if you want to stay ______.(healthy)

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单选题

You must clean the classroom, you?

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单选题

---Hi, haven‘t seen you for ages! You look great.--- ________ You look great, too.

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单选题

You look　you haven’t eaten for a week．

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材料题

und.But suppose no one had ever taught you that the world was like a huge ball.Would you have ever thought of it yourself?You cannot see the curve（曲线）of the earth at once. You would have no idea of how big it was. Thats why early man believed that the earth was small and flat.Such ideas appeared from the evidence they had.5 If you watch the stars night after night,you will see them rise and set.As you look at the sky,it is not difficult to imagine that you are in the center of a vast collection

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