描述游戏规则的简单表达 — 英语情景题

情景对话：补全对话。从下面方框中选出合适的句子，将其字母编号填在横线上。 A. No, you can't. B. How do we play it? C. Let's play hopscotch. D. You must hop on one foot. Sam: We have some free time. (1)________ Lily: Great! I like hopscotch. Sam: (2)________ Lily: First, throw your stone into a square. (3)________ Sam: Can I jump on two feet? Lily: (4)________ You can only hop on one foot. That's the rule. Sam: OK, let's start!