句型转换(每题2分,共10分)
1. He was born in 1991.(对画线部分提问)
　　　　　　　　   he born?
2. I have a big bag. He has a small bag.
My bag is________than______.
3.There were some pingpong players in our school last year.(改为一般疑问句)
　　　　there 　　　　 pingpong players in your school last year?
4. He is too young to go to school.(改为同义句)
He is _______  ________ enough to go to school.
5. They are staying there for three weeks.（对划线部分提问）
                   are they staying there？