---Look at the boy running on the playground. Is it David?---It ________ be him. I saw him go to the teachers’ office just now.
The hen_____5 eggs last week. Where did you_____ them?
I think ____ not difficult_____ English every morning.
No matter____, you must keep the school rules.
The shy girl____ to speak English in class because she’s afraid of______ mistakes.
---Do you know________? ---Yes, in two weeks.