We were completely______when we finally reached the destination.A. worn offB. worn downC. worn outD. worn away

本题考查短语辨析。根据句意，当我们到达目的地时，我们都累的不行了。选项中，worn off (疼痛、感情等)慢慢消失；worn down失去信心，筋疲力尽；worn out疲惫不堪的；worn away磨损。根据句意，正确答案是worn out，表示疲惫不堪。