显微镜镜筒两端各有一组透镜，靠近眼睛的叫目镜，靠近被观察物体的叫物镜，目镜和物镜的作用分别相当于（　　）

A．凸透镜凸透镜

B．凸透镜凹透镜

C．凹透镜凹透镜

D．凹透镜凸透镜

— This book on idioms is interesting. I’d like        , where did you buy it, Simon?

—In the Amazon Bookstore,

A．it

B．this

C．that

D．one