题目内容

按照要求进行句型转换。
1. She is doing her homework. (改为否定句)
    She __________ __________ her homework.
2. They are looking at the blackboard. (改为一般疑问句)
    __________ __________ __________ at the blackboard?
3. Tom is playing basketball. (对画线部分提问)
    What __________ __________ __________?
1. isn't doing 
2. Are they looking  
3. is Tom doing
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