题目内容
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Here is an interesting experiment. Hold a postcard in your left hand. your right hand is ready to catch the postcard, but the fingers are not touching it. If you let the postcard go, you’ll catch it without difficulty with your right hand before it falls down. If you haven’t got a postcard, you can use something like that instead. It can work well, too.
Now see if your classmate can catch the postcard when you let it go. Let your classmate hold his fingers Oil each side of the postcard, as you did before. Let the postcard go. His fingers will not catch it. You can try this as often as you want. He will not catch the postcard!
1.The passage is about ________.
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2.If you let the postcard in your left hand go, you’ll find it ________ to catch it before it falls down.
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3.Let your classmate do this as you did before, he will surely ________.
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4.If we haven’t got a postcard we can use ________ instead.
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A.something like a postcard
B.something to do with a postcard
C.everything to see
D.anything we can find
5.We can learn something about ________ from the passage.
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解析: