For over a million years, our forefathers were basically ______.A．successful farmersB．co－o

A．Nature changed our environment over the years.B．We must avoid wasting resources and

This year the company won a $10 million order for oil－drilling equipment, so she knew that

For over a million years, our forefathers were basically ______.A．cooperating huntersB．suc

As a result of the radio _______ for help for the earthquake victims, over a million pounds have bee

Over the past 20 years, the Internet has helped change our world in way or another for

For over a million years our forefathers were ba