---Daddy, shall we go swimming now?---Sorry. It’s not the right __________. I’m too tired.
---Must I return the dictionary today? ---No, you _________. But you _________ return it tomorrow.
The old farmer lived in a _______house on the farm _______ .
I ________in the factory for 2 years when I was young.
-----do you write a letter to your cousin? ----- I seldom or never do that now. Instead, I often e--mail him.
To the students, it’s _________ to enjoy a video during the class.