Mary: Hi, Steven! What do you like to do during the weekend?
Steven: I love swimming and cycling. On Saturday morning I usually ride my bike around the city or along the country road for almost two hours.
Mary: That's great! I think they do you a lot of good.
Steven: Sure, they do.
Mary: But why do you choose cycling at first?
Steven: Because it is convenient and good for environmental protection.
Mary: You are really a good citizen.
Steven: That's what I can do.

瑪麗：嘿，史蒂文，你周末喜歡做什么？
史蒂文：我喜歡游泳和騎自行車，星期六早上我要花兩個小時騎車在城里轉一轉，或沿著鄉間小路騎車。
瑪麗：真不錯，我想鍛煉對你有很多好處。
史蒂文：確實是。
瑪麗：但是最初你怎么會選擇騎自行車。
史蒂文：因為騎自行車既方便又環保。
瑪麗：你真是個好公民。
史蒂文：這只是我能做的。