短文改错/Proofreading and error correction

It was the chance of a lifetime to win the first prize on the Story Writing Show. All I had to do was to write a story or present it. My teachers have been telling me how great my writing was. So if they had said was true, I would have a chance of winning the prize. What were better, I had useful help. There was Uncle Chen, gentleman living near my house, who was a very much famous writer. He agreed to reading my story and give me some advices on how to write like a real writer.

9（）

在全口义齿修复时，对于前牙的大小的确定，不起决定作用的是（）。

A.唇的长短

B.患者的拔除前牙

C.患者的面形大小

D.颌弓形状

E.两口角线间的长度