There seems to be generation gap between me and my parents．

Mike is an ordinary boy who kept getting into trouble．

A steam engine transforms heat into energy．

The baby watched his dad shaving with great interest．

They believed that the best things in life were free：sunshine, laughing, walks in the beauty of the country, friends and music．

Scientists rediscovered the reason of the disease．

Roots take up water and hold the plant in the soil．

One has to show identity card when checking in a hotel．

In some ways, he is excellent, though he is a naughty boy．

Einstein received worldwide praise for his scientific research．