句型转换，每空一词。 
1. His ruler is in the box. (对画线部分提问)
    ___    ____ his ruler?
2. This room is Lucy and Lily's. (改为选择疑问句)
    _ _     this room Lucy's ____ Lily's?
3. Is he your friend? (改为复数)
    ___    ____ your ____?
4. These are our apples. (改为单数)
    ___    is ____ ____. 
5. The boy is all right today. (对画线部分提问)
    ___    ____ the boy today?
6. They can see a bird in the tree. (对画线部分提问)
    ___    ____ ____ see in the tree?

【考点】疑问副词,单数名词,复数名词,指示代词,疑问代词

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