一、单项填空（共10小题，每小题1分,满分１0分）
( )1. –Do you keep a dog as your pet?
–No. But I have e-dog named Charlie on line.
A. a B. an C. the D.\
( )2. There are many first-aid books in the library. You can borrow _______ if you like.
A. either B. it C. one D. every
