题目内容：

A strange thing happened in the science class today.Our teacher brought an apple and an onion to class.He cut the onion and the apple into small pieces.We tasted the apple and the onion.One was sweet and the other was terrible.

Next，he put a mask(面具) on John.John couldn't see anything.He told John to smell the apple.Then he told him to taste it.John said it tasted very good.

The teacher rubbed(摩擦) his hands with a piece of onion.Then he picked up a piece of apple.He held it under John's nose.John smelled it and made a face！It smelled like onion.The teacher put the piece of apple into John's mouth.“Yuck！” John said.“No onion for me！” Everyone laughed.It was still a piece of apple.

The teacher told us about our senses.He said we have five of them—hearing，sight，smell，taste，and touch.Our senses help us describe things.They help us know what might be dangerous.They can fool us，too，as they fooled John.

1.What did John eat after he made a face？(不超过5个词)

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2.What are our senses？(不超过10个词)

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3.What's the last paragraph mainly about？(不超过5个词)

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