第75页

信息发布者：
b
c
b
a
a
kitchen
vegetables
soup
meat
（更多请点击查看作业精灵详解）
作业精灵老师示例：
S1：Is Jim playing computer games？
S2：No, he isn't. He is eating a cake.
S1：Are they singing a song？
S2：Yes, they are.
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