某医生要比较本社区五种传染病的发病率，宜绘制（）。

A.直方图

B.百分构成图

C.条图

D.线图

E.统计地图

— Four dollars a pair? I think it's a bit too much. 

—  If you buy three pairs, the price for each will _____  to three fifty.

                                                                                                            [ ]

A. come down

B. take down

C. turn over

D. go over