1. (A) Could -> Do
Do you mind telling me the way to the nearest restaurant?
2. (C) most great => greatest
Many people believe that New York is the greatest city in America
3. (C) is smelling => smells
The food that Mark is cooking in the kitchen smells delicious
4. (C) have received => has received
Jane is the only one of our students who has received national recognition for her musical ability.