—Who’s the man over there? Is it Mr. Black? —It ______ be him. He’s much taller.
Mr. Brown wants to know your name. Please _____ on the paper.
—My parents ___ me to keep healthy. —You can do it if you exercise every day.
He may come, but I’m not sure _______ that.
—I find it difficult to learn English better.—______ you don’t give up, your dreams will come true.
These flowers are very _______. You can see them everywhere in my town.