Hi，everyone! Give me a quick answer, please.

大家好！请给我一个快速的回答。

OK!

好的！

How many days are there in a week?

一周有多少天？

Seven!

七天！

What's the first day of the week?

一周的第一天是什么？

It's Sunday.

是星期日。

Excellent!

好极了！