It was _________ difficult work ________ nobody can do it.

Cindy is a good student. She’s ________ the first to come to school. She ________ comes to school late. 

—— ________ have you been away from your hometown, Janet?——Since 5 years ago.

—____ do you clean your room?—Every two days.

I went to the Window of the World in Shenzhen. It’s ____ great ______to see a lot of beautiful views in one day.