-- 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.
A.might | B.could | C.can’t | D.mustn’t |
-- 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.
A.might | B.could | C.can’t | D.mustn’t |