单项选择题A. Japanese students study much harder than Columbian students. B. Columbian students score higher than Japanese students in math. C. Columbian students are more optimistic about their math skills. D. Japanese students have better conditions for study.

单项选择题A. He thinks it is difficult to get fuel for the car. B. He can manage to get the gasoline they need. C. He doesn’t think it necessary to refuel the car. D. He hopes the woman will help him select a fuel.