— Pity you missed the lecture on nuclear pollution. 

— I _____ it, but I was busy preparing for a job interview. [ ]

A. attended

B. had attended

C. would attend

D. would have attended

哮喘长期发作可导致（）

A.肺气肿，桶状胸

B.呼吸衰竭

C.慢性肺源性心脏病

D.继发性红细胞增多症

E.发绀