-- Look at the boy running on the ground. Is it David?-- It _______ be him. I saw him go to the teacher’s office just now.
Lucy with her mother often ______ the zoo on Sundays.
There ______ any money in my school bag.
I’m a teacher. I’m always very ______ with my work.
Most doctors and nurses ______ white clothes when they’re at work..
Dave is a reporter. He works ______.