全国各地栽培，气特异芳香，味微甜，伞形科植物

A．体轻，质松，易折断，断面粉质，显疏松层纹
B．质松而韧，横断面可见外层为海绵状物，内层为许多小室，室内有卵
C．质硬而脆，断面平坦，外层白色，中间有亮棕色或亮黑色的丝线环4个
D．体轻，中空，易碎，表面黄棕色半透明
E．体轻，骨质坚硬，“马头，蛇尾，瓦楞身”

___________it in the flesh, I would never have known the drought in southwest China is so serious and people are suffering so much.

A．Had I not seen

B．If I did not see

C．Should I not see

D．Were I not seen