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【2】At the Lesson of Physics（在物理课上）
Teacher: Explain, please, the effect of cold and heat and give examples． Pupil（学生）:Cold contracts, heat expands．That's why days are shorter in winter and longer in summer．
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【3】Twenty-eight Days Teacher: Now, Nick, tell me which month has twenty-eight days in it． Nick（ thinks a little and says）： They all have．
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【3】Twenty-eight Days
Teacher: Now, Nick, tell me which month has twenty-eight days in it． Nick（ thinks a little and says）： They all have．
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【4】The pen
Bill: Mary, give me your pen, please． Mary: why don't you want to write with your own pen? Bill: Because it always makes so many mistakes．
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【4】The pen
比尔：玛丽，你的钢笔请给我用一用。 玛丽：为什么你不想用你自己的钢笔写呢？ 比尔：因为它经常产生许多错误。 Bill: Mary, give me your pen, please． Mary: why don't you want to write with your own pen? Bill: Because it always makes so many mistakes．
