—Have you made up your mind _____ the sick kids?

—By singing songs. [ ]

A. what to tell

B. how to cheer up

C. when to help

D. where to look after

假山基础中的浅基础的施工工序主要有（）

A、砌筑基础

B、原土夯实

C、铺筑垫层

D、挖土