Answer:
My car, which was just washed, needs to be waxed.
O My car, which was just washed, needs to be waxed.
My car, which was just washed, needs to be waxed.
O My, car which was just washed, needs to be waxed.
My car, which was just washed, needs to be waxed.
Explanation:
I think this is what your looking for but im unsure
