阅读短文，根据短文内容从方框中选择恰当的句子把短文补充完整，将其代号填在答题卡相应的题号后。注意选项中有一个多余选项。

Tom, who is a famous writer about 40 years old, lives just next door. He is kind and warm-hearted and always ready to give a helping hand to others when in need,   小题2:  .

He often came to my house to tell me how to write stories and encourage me with his own experience. He told me he was born in a poor family. As a little boy, he had a dream to become a famous writer. He overcame thousands of difficulties to have entered a university. After graduation,    小题3: , and up till now, he is very famous around the country.

Unfortunately, when he was young,    小题4: and became a heavy smoker, which has ended up as an invisible killer of his health.

只要发电机内有H2或CO2，发电机密封油系统就不能停止运行。