单项选择题
A．Jack is a dull boy because he works all day long B．recreation is necessary for all of us C．we should maintain good health and enjoy life D．we should work more efficiently
A．If we work for a long time, we cannot maintain good health and enjoy life. B．If we want to get relaxed, we must participate in sports. C．The most popular way of relaxing is to become spectators. D．It is necessary that we relax for some time and have recreation.
A．no need to learn foreign languages now B．Keith is going to give the person at the information desk a surprise C．Learning is made easy with Keith' s new machine D．Communication with foreigners can be made easy with Keith' s new machine