句型转换。
【小题1】Some men are singing.(变成单数)
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【小题2】I am riding my bike now. (对划线部分提问)
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【小题3】We are sweeping the floor. (变为否定句)
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【小题4】Tom is sad. (变为否定句)
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【小题5】The boy is crying. (变一般疑问句)
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I was short.（改为否定句）
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Sally has got a new friend. (改为否定句)
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They decided to help him.（改为否定句）
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She wants to open the door.（变为否定句）
She ______ ______ to open the door.