对无法交付物品应由（），做到账物相符。

A.专人分管

B.经办人负责

C.值班员分管

D.客运主任分管

—Yuan Longping, one of the greatest scientists in China, ______ as "father of hybrid rice".

—We are proud of him. [ ]

A. is regarded

B. has regarded

C. is regarding

D. regards