句型转换。
1．The sun is yellow in the afternoon. （对划线部分提问）
________ is the sun in the afternoon?
2．The Lis are cleaning the kitchen at home. （对划线部分提问）
________ are the Lis ________at home?
3．Jane is sitting in front of Mike. （改变句子，但意思不变）
Mike is sitting ________ Jane.
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