Mary enjoys homemade food, so she seldom, ________, eats out. [ ]

13．The doctors have told him to ____ smoking and drinking.

____ the workers are very tired, _____they keep on working. — They are great. We must learn from them.

Mr. Jiang, as ______ elderly man, took part in the Special Games for ____ elderly, and finished _______ second in the race.

By the time he was 14, Mozart many pieces of music for violin, piano and for orchestra.