每天早上我都会喝一杯咖啡。

I drink a cup of coffee every ___morning.

他在走廊遇见老师时微笑着说：“早上好”。

He smiled and said "___Good morning" when he met his teacher in the hallway.

在项目开始的早晨，我们遇到了很多技术挑战。

At the ___morning of the project, we encountered many technical challenges.