课堂探究常用表达1As we all know，fast food is becoming more and more popular.2There are several reasons for./Reasons for.are as follows.3It is convenient and can save a lot of time.4The quality of fast food is guaranteed.5If not，it will be harmful to their growth.6It is far from satisfactory.7In my opinion，fast food./I suggest that.写作结构第一段：介绍 fast food 受人喜欢的现状；第二段：列举 fast food 受人喜欢的原因（使用主题句 There are several reasons for.，然后分述原因） ；第三段：指出 fast food 的弊端（也可与第二段合并，用 however 作为过渡） ；第四段：提出合理化的建议或要求。
