4.“tap-dancing to work”：“跳着踢踏舞工作”。tap原意是“叩击、轻敲”；tap dance是“踢踏舞”。这里实际意思是“(手指)轻轻敲击键盘的工作”。
5.PC(personal computer)：个人计算机
6.But for all the cool things that a person can do with a PC，there are lots of other ways we can put our creativity and in telligence to work to improve our world.要不是每个人利用个人电脑创造出如此多的美好事物，那我们也会有许许多多的其他方法将我们的创造性和智慧投入到工作中去改善我们的世界。本句中but for的意思是“要不是；若非”；com是美国俚语(=great;excellent)，意为“美妙的；很好的”，现在我国有人直接将其音译为“酷”。
7.go unmet：得不到满足。在这里go是系动词，unmet是过去分词作表语。
8.commit(oneself)to do sth..:致力于……
9.no less…than：和……一样，不亚于….”
10.and that it doesnt take much to make an immense difference in these childrens lives：而且要将这些儿童的生命分出个三、六、九等来也是没有什么意义的。本句中take，的意思是“获得”，doesnt take much就是“得不到什么”的意思。此处it是形式主语，真正的主语是不定式短语 to make an immense difference in these childrens lives.
练习:
1. A computer was as big as an icebox when Bill Gates was a high school student.
A Right B Wrong C Not mentioned
2.Bill Gates has been dreaming of the popularity of computers for his lifetime.
A Right B Wrong C Not mentioned
3. Bill Gates compares his hard work on a PC to “tap dancing to work”.
A Right B Wrong C Not mentioned
4. To Bill Gates’ mind， there is a big difference between the death of the poor’s children and the death of the richs children.
A Right B Wrong C Not mentioned
5. So far Bill Gates has contributed several dozen billion dollars to the charities.
A Right B Wrong C Not mentioned
6. Bill Gates and his wife consider it their duty to help the poor better their health and education as much as possible.
A Right B Wrong C Not mentioned
7. Bill Gates will leave only a small portion of his wealth for his children.
A Right B Wrong C Not mentione
答案与题解：
1.A 文章第三段，扣比尔·盖茨说到，当他念七年级时，电脑就是冰箱那么大小。
2.A 文章第三段比尔·盖茨说，他30年前与Paul Allen一起创办微软公司时就梦想一桌一机、一户一机，而且从其他各段也可以看到他对电脑有很多很多的期待。
3.B 从第七段第二句可以看到作这样比较的是他的朋友Warren Buffett，而不是他自己。
4.B 在倒数第三段，比尔·盖茨已经明确说，所有这些儿童的死亡都一样令人伤心和悲痛，没有什么区别；把他们区别开来也没有什么意义。
5.C 文章并没有提到他给慈善机关捐款的事，虽然他捐了数以百亿计是一个事实。
6.A 倒数第四段比尔·盖茨认为他一生好运，就理应回报社会，所以他和他的妻子做出了承诺。
7.C 尽管这也是比尔·盖茨表示过的意思，但文章并没有提到。