任务一：阅读下列的对话和菜谱，完成调查任务。
How to make a ...?
Jane: What's your favorite food, Bob?
Bob: My favorite food is hambu rger.
Jane: Can you tell me how to make hamburgers?
Bob: Sure. First, mix together a pound of ground beef （牛肉末）, half of a chopped onion, a qu arter of a teaspoon of pepper, three quarters of a teaspoon of salt. Shape the mixture into four hamburgers. Then, b arbeque them for five minutes on each side. Serve the hamburgers on a toasted hamburger buns with sliced tomato, lettuce, and any other vegetables you like. Yum, hamburgers are my favorite.
