单项选择题
A．Being isolated. B．Taking part in social activities. C．Gaining more knowledge about society. D．Having more contacts with the outside world.
A．The 23rd Olympic Games. B．Los Angeles hosting the Olympics. C．Using computers before and during the 23rd Olympics. D．A sophisticated computer.
A．Do as much exercises as we can. B．Grow flowers. C．Drink a cup of coffee everyday. D．Eat a balanced diet.