Bob, where do you work— I work for a shop sells different kinds of mobile phones.

_______does your mother watch the Talk show—Once a week.

It was 3 o’clock _______we arrived at the village.— Oh, it was also at 3 o’clock ______we arrived at the village. [ ]

填入下段文字中的短语，与上下文衔接恰当的一项是自从地球印下人类的足迹以来，地球的容颜逐渐由美变丑了。特别是迈入工业社会之后，人类在向大自然索取大量财富的同时，也排放大量废气、废水和废渣，污染着自己赖以生存的① ，地球伤痕累累，公害频频发生，② ，人们感到生活在一个缺乏安全的环境中。

.Only when your identity has been checked ________.