Recently I have been quarrel ling about my mother over whether I can watch TV after the school. She holds the view that Senior Three students have to make fully use of every minute to work hard at their lesson. It seem to her that I am allowed to watch TV, I won’t be able to control me and I’ll forget all about my studies. She also thinks that it is bad to my eyes. But I really can’t accept her ideas. In my opinion, watch TV can set my mind at rest after a day’s hard work. Besides, it is important for me to know what had happened both at home and abroad. However, I shouldn’t be forbidden to watch TV.

成人咽鼓管全长为（）。

A.15mm

B.25mm

C.45mm

D.35mm

E.55mm