第7题: [单项选择]Questions 18-21 are based on the following dialogue.How does David go back home from the store A. On foot. B. By bike. C. By car. D. Jane offers him a lift. 参考答案:A 答案解析:[听力原文]18-21 W: David, can I give you a hand with one of those grocery bags M: Sure, Jane. Cou