Sometimes people call each other "cat", but have you ever thought about this expression?

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• Sometimes people call each other “scaredy-cat”,but have you ever thought about this expression?
• Sometimes people call each other "cat", but have you ever thought about this expression?
• Sometimes people call each other “scaredy-cat”,but have you ever thought about this expression?When a cat is frightened,its heart starts beating faster,its muscles get tense,and there are changes in the chemicals in its blood-stream.Although the cat doesn’t realize this,its body is getting ready for action.If the danger continues,this animal will do one of the two things.It will defend itself,or it will run away as fast as it can.Something like this a
• 阅读理解Have you ever made something to solve a problem?Have you ever made something to solve a problem?If you have,you’re an inventor.Inventors often make things to solve problems.These things are called inventions.Some inventions are new things while other inventions make old things better.About half a million kids invent things each year and some kids even sell their inventions.A six-year-old girl didn’t like cleaning the spoon she used to feed her cat
• Sometimes people call each other "cat", but have you ever thought about this expression?
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• Sometimes people call each other “scaredy-cat”,but have you ever thought about this expression?When a cat is frightened,its heart starts beating faster,its muscles get tense,and there are changes in the chemicals in its blood-stream.Although the cat doesn’t realize this,its body is getting ready for action.If the danger continues,this animal will do one of the two things.It will defend itself,or it will run away as fast as it can.Something like this a