—He ____be in the classroom, I think.

—No, he_____ be in the classroom. I saw him go home a minute ago.

A．can, may not

B．must, may not

C．may, can’t

D．may, mustn’t

男性，68岁。反复咳喘发作多年，现喘促气短，动则喘甚，汗出肢冷，舌淡，脉沉细。治疗应选取哪组经脉为主（）。

A.手太阴、足太阴、任脉

B.手太阴、足太阴、足少阴

C.手太阴、足厥阴、督脉

D.手太阴、足少阴、背俞穴

E.手太阴、足少阴、督脉