如图是生态系统的组成示意图，请据图用图中序号回答问题：

把下列句子组成语意连贯的文字填入划线部分，排列顺序最佳的一组是（     ）

古诗中有“春到人间草木知”的名句，在鲁迅笔下，知春、报春、不争春，正是崇高的野草魂。              。最可贵的是，你虽知花叶不美，但仍然散发着一点无名野香，给那里带去春色和生机。

①在雪的下面，已经出现了“冷绿的野草”，在初春的寒风中，勃发着盎然的春意

②严冬刚过，残雪犹存

③为使春意更浓，春色更娇，你甘当陪衬、默默无闻

④待到春满人间，姹紫嫣红开遍，你却不居功、不争俏

根据句意及所给中文提示或英文解释，写出句中所缺单词，每空限填一词。
(1)Keep a____ (微笑) all the time, you'll have a happier life.
(2)The weather report says it will be ____（有雨的）. Please take an umbrella with you.
(3)Drivers should ____ （停车）their cars in the right place, or they will be fined.
(4)Audrey Hepburn had put her ____ （努力） into ballet training before she entered the film industry.
(5)Daniel's____ （努力）is to be a famous director in the future.
(6)Zhang Sen was a brave young man. He____ (keep somebody safe from danger)a young lady from a river several months ago.
(7)Our teachers are____  (treating every person equally) to everybody in our class. We all love them.