[单项选择]What’s the woman worried about
A. Joan may have taken a wrong train.
B. Joan won’t come to the conference.
C. Joan will miss the next conference.
D. Joan may be late for the opening speech.

Many people are worried about what television has done to the generation of American children who have grown up watching it. For one thing, recent studies show that TV weakens the ability to imagine. Some teachers feel that television has taken away the child’s ability to form mental pictures in his own mind, resulting in children who cannot understand a simple story without pictures. Secondly, too much TV too early usually causes children to be removed from real-life experiences. Thus, they grow up to be passive watchers who can only respond to action, but not start doing something actively. The third area for such a worrying situation is the serious dissatisfaction frequently expressed by school teachers that children show a low patience for the pains in learning. Because they have been used to seeing results of all problems in 30 or 60 minutes on TV, they are quickly discouraged by any activity that promises less than immediate satisfaction. But perhaps the most
A. read story books
B. understand pictures in books
C. have ideas of new things
D. think in a clear way