Is that her pencil?改为复数句Their history teacher is Miss Yang.对划线部分提问 What's your age?改为同义句

Is that her pencil?改为复数句: Are those their pencils?
Their history teacher is Miss Yang.对划线部分提问. 没有划线部分
What's your age?同义句 How old are you?

1.Are these their pencils?
2.对Miss yang提问：who's their history teacher？
3.How old are you?

Is that her pencil?改为复数句：Are these their pencil?
Their history teacher is Miss Yang.对划线部分提问 Who are their history teacher? What's your age?改为同义句:How old are you?

Is that her pencil?改为复数句
Are those her pencils?
Their history teacher is Miss Yang.对划线部分提问
哪里划线？
What's your age?改为同义句
How old are you?

Are those her pencils?
Who is their history tearcher?
How old are you?

Are those her pencils?
Who is their history teacher(假设划线部分是Miss Yang)
How old are you?