4．用非限制性定语从句升级句2

　　What's worse，there was a nuclear power station explosion，which added to people's panic.

　　【参考范文】

　　A Severe Earthquake

　　A huge earthquake occurred suddenly，sending a high tsunami，causing great damage to people there.According to the recent report，more than 10，000 were killed and over 20，000 were missing.What's worse，there was a nuclear power station explosion，which added to people's panic.

　　Though lots of countries sent many rescue teams to help them，they were still in trouble.The unexpected disaster resulted in plenty of problems，such as the shortage of electricity supply.Moreover，the nuclear power station explosion polluted the fresh water in some areas，which was unfit for babies to drink.But as days passed by，it was hoped that the situation would get better.

　　As is estimated，this disaster has caused a loss of more than 200 billion dollars.