I don’t know when my son ________ back. When he_________ back, I’ll call you.

A．comes, comes

B．will come, will come

C．comes, will come

D．will come, comes

男性，72岁，发热1周伴咳嗽，咳砖红色胶冻状痰。X线胸片右肺上叶实变，水平裂下坠。肺炎病原体最可能是（）。

A.肺炎球菌

B.肺炎克雷伯杆菌

C.铜绿假单胞菌

D.军团菌

E.金黄色葡萄球菌