My grandma was a teacher.（对划线部分提问）
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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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The school finishes at half past five.（对画线部分提问）
______ ______ the school ______ ?

I made a cake.（对画线部分提问）
_______ did you _______ ?

It's an invitation to Mary's birthday party.（对画线部分提问）
______ is ______?