🗣️ 情景例句
If you don't know a person's last name, use 'ma'am' or 'sir'.
如果你不知道一人的姓， 你应称呼他为 'ma'am' 或 'sir' 。
Our family always has a traditional Christmas.
我们家每年都要庆祝传统性的圣诞节。
Learning English is like building a house.
学英语象盖房子。