You will have fun if you _____tomorrow. [ ]

A. go hiking                    

B. will go hiking

C. went hiking                  

D. are going hiking

在鼻-鼻窦恶性肿瘤的TNM分期中，Tx代表（）

A.无原发肿瘤的证据

B.原发肿瘤不能确定

C.原位癌

D.肿瘤局限于黏膜

E.肿瘤侵犯下部结构