The old woman ______ her sons and daughters ______ and see her from time to time.

—Will you be able to finish the report before Friday? —I can’t ________ anything, but I’ll try my best. 

He’s rather walk than ___ a bus in the rush hour.

Large quantities of solid fuel________ consumed every day and too much carbon dioxide is   sent into the air，which in turn________ the going up of temperature.

Tom studied hard .He wanted to ________ of the good chance to learn .