1．Don't forget to praise them sincerely (真诚地) when someone does something good.
2．After learning that the boys had been lost for almost 20 hours, the police sent out a rescue (营救) team to look for them.
3．With so many miners buried (掩埋) under the mine, none of the rescue workers would stop to have a rest.
4．A water pipe burst (爆裂) and the entire apartment was flooded.
5．Too much drinking will do damage (损害) to your health; you should take the doctor's advice.
6．It is useless (无用的) discussing the matter with him.He won't change his mind.
7．The first thing he did was to find shelter (掩蔽处) from the freezing wind and snow.
8．It was the second air disaster (灾难) in the region in less than two months.
