---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

慢性再生障碍性贫血经治疗已缓解，拔牙时血红蛋白含量应高于（）

A.12g/dl

B.11g/dl

C.10g/dl

D.9g/dl

E.8g/dl