下列哪项不能作为卵巢肿瘤诊断的辅助检查（）

A.细胞学检查

B.放射学检查

C.B超

D.肿瘤标志物

E.后穹隆穿刺

－What’s wrong with Tom? He didn’t talk to         all the afternoon.

－Oh, he failed in his exam.

A．somebody

B．anybody

C．nobody

D．no one