What a pity! If I had known Tom earlier, I ________ him to the party.

A．had invited

B．would invite

C．invited

D．would have invited

下列哪种甲状腺肿瘤电镜下细胞内可见神经内分泌颗粒：（）

A．甲状腺滤泡性腺瘤

B．甲状腺 * * 状癌

C．甲状腺未分化癌

D．甲状腺髓样癌