I really want to know _______.

A．what is wrong with my brother

B．how will he go to Beijing tomorrow

C．if had he bought that car

D．where did he go yesterday

男性，55岁。下颌前牙出现剧烈疼痛、出血3天。口腔异味明显。患者吸烟多。口腔检查：唇侧龈缘如虫蚀状，覆有灰褐色假膜，可擦去，留下出血面。龈 * * 和边缘龈呈直线刀切状。无松动，无牙周袋。口腔内有特殊腐败臭味。颌下淋巴结肿大压痛。可能的诊断是（）

A.急性白血病的牙龈表现

B.急性龈 * * 炎

C.急性坏死性溃疡性龈炎

D.急性坏死溃疡性牙周炎

E.急性疱疹性龈炎