---The president _____ by his doctor today that his cancer has come back.

A．informs

B．has informed

C．has been informed

D．is being informed

已开展的鼻咽癌的EB病毒血清学检查方法包括()

A．EBVCA-IgA

B．EBVCA-IgC

C．EBV-specific

D．EBNA-IgA

E．EBNA-IgC