D．parents like keeping their children indoors

答案　B

解析　推理判断题。从第三段最后一句中的"We want parents to see what this magical wonder product does for their kids' development，independence and creativity，by giving wild time a go."可知，选B项。

4．What's the main idea of Paragraph 4?

A．Modern children need wild time.

B．Adults value outdoor activities.

C．The present world is complicated.

D．This generation of kids have no freedom.

答案　A

解析　段落大意题。第四段第一句中的"...it seems that going back to basics and experiencing 'nature's playground' is what modern children need."是段意所在。故选A项。

When 7­year­old Warren Buffett said，"I will be the richest man one day，"his friends made fun of his "daydreaming"．But ever since then the little boy has set about learning how to make money by selling drinks，delivering newspapers and buying stocks.The American had already earned 9,000(equal to 90,000 today) by the time he graduated from high school.

And this month the 78­year­old man，who earned his fortune by making a lot of sound investment in the stock market，took the place of Microsoft founder，Bill Gates，as the world's richest man.Gates' worth declined 1.5 billion to 55.5 billion in 33 days after the recent financial storm，according to Forbes Magazine.

Buffett，the only son of a stockbroker，was ready to think outside the box to develop his business from a very early age.At 8，he went to golf courses collecting and selling the used balls.At 11 when he sold soda pop door­to­door with a friend，the pair collected lids on streets to judge which flavor was the most popular.

As a paper boy during high school，Buffett delivered two competitor papers，so that even when customers canceled one of the subscriptions，he could still make a profit from the other.With his paper delivery savings，Buffett bought 162,000 square meters of farmland and collected rent.Young Buffett stepped into the stock market at 11 but earned only 5.The experience taught