I think      can make Andy change his mind. He is such a person who never gives up easily. 

We must ______ known to all that smoking is harmful to heart.

—Can I help you, boy?—Yes. There is ______ wrong with my bike. 

—Where can I get this medicine?—At _______ chemist’s. It’s on sale everywhere.

—Do you want tea or coffee?—          . I really don’t mind.