____ of the land in that district____ covered with trees and grass.

StephenHawking believes that the earth is unlikely to be the only planet _lifehas developed gradually.

Where is your sister, Dick I need her help. — Dad, she in her room. Let me help you instead.

I wonder why you failed so many of the questions. Only the first question was difficult, but the rest, I thought, ______ very easy.

________production up by 60%，the company has had another excellent year.