What is urgently needed in China is a complete overhaul (大修) of the enforcement practice, with every official held accountable for his failure to enforce the law strictly! Why wait till lives are lost before acting?

　　本文讲述的是天津爆炸事件使人们引发的思考：为什么不在事故发生前去排除安全隐患，而总是在事后进行补救呢？

　　5．What does the fact that the huge explosion in Tianjin resulted in serious injuries show?

　　A．It is very difficult to enforce laws.

　　B．People are not aware of the danger.

　　C．The law was not strictly enforced.

　　D．There is no law for ensuring us safe.

　　答案：C　细节理解题。根据第一段“Laws are often not enforced (执行),

　　or are enforced half－heartedly.”可知。

　　6．In what purpose do some residents dig into their ground floor units according to the passage?

　　A．To follow their neighbors.

　　B．To create an extra basement living area.

　　C．To protect themselves safe.

　　D．To add an extra floor to the roof－top of their apartment blocks.

　　答案：B　细节理解题。根据第三段“For instance, ... while others dig into their ground floor units to create an extra basement living area”可知。

　　7．How did the author develop the passage?

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