Frank bought a new doorbell, but nobody seemed to notice it. When his friends came, they knocked heavily at the door. Frank was not happy about it.
One day a friend came to see Frank. He knocked at the door loudly. Frank came to the door, but didn’t open it. He shouted at the visitor from inside. “ I can’t hear you! Please ring the doorbell!”
小题1:What did Frank buy?
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小题2:Why wasn’t Frank happy?
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小题3:Who came to see Frank one day?
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小题4:Why didn’t Frank open the door?
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小题5:Did Frank hear the knock?
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