—What do youthink of Robert? —He is a bright boy, but he must ____ his talent withhard work if he wa

—What do youthink of Robert? —He is a bright boy, but he must ____ his talent withhard work if he wants to succeed. A. leave B. match C. combine D. show

The sentence suggests that Robert has a natural talent, but he needs to use it together with hard work to succeed.

The word that fits best here is combine, because it means to join or bring together two things (talent and hard work).

The correct choice is C. combine.

So the completed sentence would be:
He is a bright boy, but he must combine his talent with hard work if he wants to succeed.