单项选择题
Passage One
A. It is a network for shopping malls, offices and homes. B. It relieves the heavy burden of teachers in school. C. It simplifies the process of making friends online. D. It quickens sales of software products and intelligence.
A. Worse than in the past. B. As bad as in the past. C. Not so dangerous as in the past. D. As necessary as in the past.