To keep healthy, Mr. Smith_______ cycling as a regular form of exercise after he retired.
Today, housework has been made much easier by electrical _____.
The _____ of the trees in the water was very clear.
One _____ needed when making a cake is flour; another is sugar.
They have been waiting for many hours to see the singer, but the airplane must have been _____.
Neither of them thought highly of him and they both tried to _____ him in his work.