is it a pen?
what is three and six?
is it a pen or a pencil?
what is three and six?
is it a pen or a pencil?
what does three plus six equal?
It's a pen .(用a pen 改为选择疑问句）
Is it a pen or a pencil.(这里的pencil可以是别的东西）
Three and six is nine.(划线部分提问）划线是nine
What is three and six?
is it a pen or a pencil?
what's three and six?
Is it a pen or a pencil?
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