题目

水生动物的运动方式形形色色，其主要的运动方式是(     ) A．漂浮 B．游泳 C．倒退 D．爬行 答案：B-- _____ is the train station from the post office, do you know? -- About 30 minutes’ ride by bike. A. How much                                           B. How long          C. How far                                               D. How soon