6. He _____ to lend me his bicycle but I refused．for I didn’twant to trouble him．

To keep healthy, most retired people _______ jogging as a regular form of exercise.

—The cars give off a great deal of waste gas in the street.—Yes, But I’m sure something will be done to       air pollution.

The film star is content with herself，and she always likes to ________  her nice figure by wearing tight dresses in public.

The trade union in this industry are ____ any reduction in wages.