To his surprise, the lifestyle he was used to ______ greatly in the past few years.

A．change

B．changing

C．changed

D．has changed

高处作业地点、各层平台、走道及脚手架上堆放的物件不得超过允许（），施工用料应随用随吊。禁止在脚手架上使用临时物体（箱子、桶、板等）作为补充台架。