A. One month. B. One month and a half. C. Two months. D. Two months and a half.
单项选择题A. Lower prices. B. More choices.C. More competition. D. More companies.
单项选择题A. Because they are too small to understand the rules.B. Because they are absent-minded.C. Because they don’t have much time for it.D. Because they are not interested in it.