凉山火灾英语作文

People are alarmed by the succession of campus fires in recent years. In each of these accidents heavy casualties were reported - houses were burned down students lost their lives and properties were...

When did people start to use fire?No one knows,but we know it was a long time ago.Some people say it was about 200,000 years ago.Other people say it was 1,000,000 years ago.Fire was useful then and...