Flush the pills down the toilet.
Take the pills to a pill-take back program at your pharmacist's.
Leave the pills as they are in the medicine cabinet.
Throw the motor oil down a sewer drain outside for easier disposal.
Take the oil to a Hazardous Waste Disposal plant to be disposed properly.
Give the oil to a neighbor for them to use it.
Large oil spills
Pouring oil down the drain
All of the Above
Groundwater and other water resources
Lake Simcoe and Kawartha Lakes
Here's an interesting quiz for you.