— There is still a copy of the book in the library. Will you go and borrow _____?

— I'd rather buy _____ in the book store. [ ]

A. it; one

B. one; one

C. one; it

D. it; it

悬挑式卸料平台由（）组成。

A.钢平台

B.悬吊机构

C.防护装置

D.钢丝绳

E.型钢梁