The teacher, with 6 girls and 8 boys of her class, ____visiting a museum when the earthquake struck  [ ]

A. was        

B. were        

C. had been    

D. would be

男性，59岁。慢性咳喘20余年，近2年来动则气急来诊。体检两肺散在干湿啰音。X线胸片示两肺纹理增多，横膈低平，侧位片见胸骨后间隙明显增宽（）

A.桶状胸

B.鸡胸

C.扁平胸

D."鞋匠胸"

E.漏斗胸