序数词表达日期：first, second... — 英语情景题

情景对话：Sam 和 Lily 在聊生日日期，补全对话（每空填一个序数词）。 Sam: Hi, Lily! When is your birthday? Lily: It's on May 1. That's the (1)________ day of May. Sam: Cool! My birthday is on May 2, the (2)________ day of May. Lily: Wow! Our birthdays are together! Sam: Yes! And Tom's birthday is on May 3, the (3)________ day of May. Let's go to his party! Lily: Great! See you on May 3!