. How pleased the detective was _____ what his customer told him!

A．hearing 　

B．heard

C．to hearing 　

D．to hear

常出现淋巴结坏死破溃形成瘘管的疾病是（）

A.慢性淋巴结炎

B.淋巴瘤

C.结节病

D.淋巴结结核

E.恶性肿瘤淋巴结转移