一阅读理解
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Children's lives have changed greatly over the last 50 years．But do they have a happier childhood than you or I did?
It's difficult to look back on one's own childhood without some element of nostalgia(怀旧的). I have four brothers and sisters, and my memories are all about being with them．Playing board games on the living room floor, or spending days in the street with the other neighborhood children, racing up and down on our bikes, or exploring the nearby woods．My parents scarcely appear in these memories, except as providers either of meals or of severe blame after some particularly risky adventure．
