依次填入下面一段横线处的语句最恰当的句子是人类并非像想象的那样脆弱，紧张的确是生活中不可缺少的部分。____________。生活在战争期间的人，发病率明显低于生活在和平环境中的人。这是由于人们在战争环境中精神紧张、生活积极、进取心强，所以长期充满活力，抗病能力也随之增强。

Could you tell me something more about Hong Kong? —–I am ______going there for a holiday soon.

___ the fact that many drivers are ever trained,we cannot stress too much the importance of traffic safety

fety belt saved the boy; otherwise, he _____ inthe accident.

wChina Daily, New York Times and so on.