ere is less and less coal and oil,scientists are exploring new ways of making use of ______ energy, such assunlight, wind and water for power and fuel

In my opinion, there’s no greater happiness than of succeeding in one’s career.

Idon’t______rock’n’roll.It’smuchtoonoisyformytaste.

_______ smoke here, dad. Smoking hasbeen banned in public places.

She can play_______ piano, and she plays it ________.