题目内容：

句型转换。(10分)

1.I am Jack. (改为一般疑问句)

__________ __________ Jack?

2.They are from Cuba. (改为否定句)

They __________ from Cuba.

3.Is this a bus?(改为复数)

__________ __________ __________?

4.I am in Class Two, Grade Seven. （对划线部分提问）

__________ __________ are you in?

5.My friend is twelve years old.（对划线部分提问）

__________ __________is your friend?