11.   Heat the oil in a medium nonstick skillet over fairly high heat.

12.   Heat the olive oil in a medium skillet over moderate heat.

13.   Heat a medium skillet over low heat.

14.   Heat oil in a medium skillet over medium heat.

15.   Heat oil over medium-high heat in a medium nonstick skillet coated with cooking spray.

16.   Heat peanut oil in medium sized skillet and stir fry onions until lightly browned.

17.   Heat the oil in a medium skillet or pot that has a lid.

18.   Heat a medium skillet over medium-high heat.

19.   Heat olive oil in medium skillet over moderate heat.

20.   Heat the oil in a medium skillet over medium-high heat.