单项选择题
A. Yes, I think so. B. Certainly. C. What can I do for you D. Do you think so
A. Time is limited. B. This is the last one. C. It might not be of good quality. D. You should buy cheap things.
A. Jack likes to play volleyball. B. Jack always goes to volleyball games. C. Jack often enjoys himself. D. Jack never goes to any ball games.