—The boy between Mr Green and Mrs Green is lovely. Is he their son Tom?
—It ______ be him. I’m not sure.
A. must B. mustn’t C. may D. can’t
—The boy between Mr Green and Mrs Green is lovely. Is he their son Tom?
—It ______ be him. I’m not sure.
A. must B. mustn’t C. may D. can’t
C