— I'm leaving tomorrow.

— Oh, what a pity! I won't be able to see you off. I ____ a tele-conference the whole morning.

A．have

B．am having

C．will be having

D．will have had

患者男性，44岁，因“进行性吞咽困难伴声音嘶哑1个月”来诊。查体：双颈部多发肿大淋巴结，最大者位于右颈部，直径约4cm。间接喉镜：右侧梨状窝灰白新生物，表面不平。

首先考虑的诊断为（）

A.食管癌

B.喉癌

C.甲状腺癌

D.舌根癌

E.下咽癌