—Listen! Is Mary singing in the next room?—No. It _______ be Mary.She has gone to Shanghai for an important meeting.
—Is ______ your dictionary? —Yes, thank you. And ______ are my books.
—Is the book on the desk? —______. It’s under the desk.
Those photos ______ nice.
My good friend’s name is Jim Green. Green is his ___________.
There’s __________ “u” and __________ “l” in the word “ruler”.