在下面一段文字横线处补写恰当的语句，使整段文字语意完整连贯，内容贴切，逻辑严密。每处不超过17个字。

    全球气候在整个20世纪确实一直在变暖，____？对此，众说纷纭。有些科学家认为20世纪气候变暖是“小冰期”气温回升的延续，是自然演变的结果，跟“温室效应”无关。但有些人反对这个观点，他们认为，____，而人类是造成“温室效应”的罪魁祸首。气象系统是十分复杂的，无论地球变暖是否因为“温室效应”，我们都应该加以关注。相信总有一天，____，从而改善环境，造福人类。

    Mrs. Black has three daughters. Sue is the ____ (young) of the three. She is ____(outgoing) than her two sisters. She always tells some funny jokes ____ (make) people laugh. At school, her teacher thinks that Sue is the ____ (hard-working) student and that she does thing the ____ (carefully).

    Sue has a dream she want ____ (be) a reporter. To achieve (实现) her dream, Sue makes a plan. First she decides ____ (join) the writing Club to practice writing. Second, she tries ____ (talk) with her penfriends in different languages. To meet more people and talk with them, Sue plans ____(work) in some public (公共的) places. I'm sure she will be one of the ____ (famous) reporters in the world. Good luck to her!