D．It's too dangerous to play outside.

　　答案：B　细节理解题。利用排除法，根据第三段“Firstly, families are smaller，”“...more than they used to about real or imagined dangers.”以及第四段中“the kind of toys children have and the way they play is totally different.”可知A、C、D均是童年发生改变的原因，B项中的内容并非是导致童年改变的原因。

　　6．What has the writer focused on in the fourth paragraph?

　　A．Young people today shouldn't play electronic games.

　　B．Some games that young people play today aren't really good.

　　C．Computer and video games have replaced the board games.

　　D．Board games are much more interesting than computer games.

　　答案：B　细节理解题。根据第四段“The irony is that so many ways of playing games are called ‘interactive’. The fact that you can play...increases the sense of loneliness felt by many young people today”可知。

　　7．The writer's attitude towards the childhood changing is ________.

　　A．approving

　　B.unconcerned

　　C．objective

　　D.optimistic

　　答案：C　推理判断题。本文在论述童年生活上的变化时，均是很客观地列举事例来证明，因此，答案是C。

　　1．explore vt. 探索；探测

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