a) The ferry is moving on the water. -This one seems okay, but it depends on the context. Maybe "through" the water would be better.
(b) She walked along the school. -"She walked along the road/river/etc to the school." or "She walked to school."
(c) Dr Lee fills the patients' cavities.- This one seems okay.
(d) We rowed by using oars.-"We rowed using oars." but more context is needed because it might be "We rowed using the oars."
(e) The ambulance sends/carries /takes patients to hospital. -"The ambulance takes patients to hospital" is good, though "carries" is also possible. "The ambulance sends patients to hospital" means that the ambulance stays at the accident while the patient goes to the hospital.