It is ____ short distance from here to _____ shopping center, so you can walk there if you like.  [      ]

A. 不填; 不填    

B. a; 不填        

C. the; the    

D. a; the

《经史证类备急本草》的作者是

A．赵学敏

B．唐慎微

C．李时珍

D．苏敬

E．陶弘景