前言
Unit 1 Will people have robots?
作业1
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Unit 2 What should I do?
作业3
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Unit 3 What were you doing when the UFO arrived?
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Unit 4 He said I was hard—working.
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Unit 5 If you go to the party,you'll have a great time.
作业9
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Unit 6 How long have you been collecting shells?
作业11
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Unit 7 Would you mind turning down the music?
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Unit 8 Why don't you get her a scarf?
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Unit 9 Have you ever been to an amusement park?
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Unit 10 It's a nice day,isn't it ?
作业19
作业20
参考答案