按要求完成句子
The panda comes from Africa . (改为否定句 )
The panda                       from Africa .
I use a computer at the weekend .(对划线部分提问)
                    you use a computer?
He often makes a birthday card for his son .( 改为否定句)
He         often         a birthday card for his son .
They are healthy food . (改为一般疑问句)
                 Healthy food ?
My sister is on the left .(对划线部分提问)
                  your sister ?