— Where do you have lunch _____________ Mondays?

— I have lunch _____________ school.[ ]

A. in, at

B. on, at

C. on, in

在钢筋混凝土预制桩基础施工时对桩顶标高不一的桩宜按（）的顺序施打。

A.先浅后深

B.先大后小

C.先长后短

D.先深后浅