— Mum, I feel terrible today. I think I ______ catch the A / H1N1.

— Don't worry. But it can't be the A / H1N1. Follow the doctor's advice and you'll get well soon. [ ]

A. must

B. may

C. can

耳廓假性囊肿的囊壁内层为（）

A.鳞状上皮

B.纤毛柱状上皮

C.扁平细胞上皮

D.内皮细胞

E.纤维素