1. down the sidewalk | to the hospital 2. at 11 P.M. | until 7 P.M. 3. in a hospital 4. After doctors and nurses | for administrators, dietitians, and lab workers 5. of caring professionals (Object of preposition would also be dietitians and lab workers.) 6. in the gift shop | as a volunteer 7. for the children | with serious illnesses 8. with flashing lights | onto the scene
