British and American English are different many ways

Is this red bag yours—No, it isn’t. is that black one.

n in blue must be your brother,_____

依次填入下列横线处的关联词语，最恰当的一组是(　　 )当前全国安全工作形势严峻，出现了种种问题，________有多方面的原因，________根本原因在于原有体制的弊端没有消除，有些政府官员安全责任意识不强。________，要尽快扭转这种局面，________通过进一步深化安全改革，________能实现。

If there are _________cars, there will be _________air pollution. —Yes. And the air will be cleaner.