同学你好，该知识点来自沪江网校《大学水平直达雅思7分【剑桥全能随到随学班】》的课程，想要更系统的学习，欢迎进入课程学习。不仅可以和更多的同学一起学习，而且还有老师、助教随时的学习指导和知识点解答哦。

同学你好~
1. F. First of all, I’d like to thank you for inviting me to debate this crucial issue.  
解释：句子（1）是演讲的开场白，表达感谢。选项 F. First of all,常用于开始演讲或讨论时引出第一个点（这里是感谢），符合语境。

2. C. Furthermore, I realize it’s a lovely sunny day, so thanks for coming to support this event.  
解释：句子（2）在（1）的基础上，进一步感谢听众出席（尽管天气好，他们还是来了）。选项 C. Furthermore, 表示递进，添加额外信息（这里是另一个感谢），使句子连贯。

3. E. It’s well known that the rare Great Bustard bird has been reintroduced into Britain.  
句子（3）陈述一个事实（Great Bustard 被重新引入英国）。选项 E. It’s well known that 用于引述众所周知或公认的事实，符合这里的信息性语气。

4. A. However, how many of you knew that it was once considered extinct? That its survival is not guaranteed? Or that its size makes it an easy target for hunters?  
解释：句子（4）在（3）的积极事实（重新引入）后，转折到问题（鸟类仍面临威胁）。选项 A. However, 表示转折，突出对比（尽管被重新引入，但问题依然存在），使逻辑清晰。

5.G. Another point is that its nests are often destroyed by agriculture. Some eggs survive, but most do not.  
解释：句子（5）添加另一个问题（巢被农业破坏），是（4）的延续。选项 G. Another point is that 明确表示添加新论点，与（4）的问题形成并列，增强论证结构。

6. D. In short, we need better laws to help preserve this still endangered species. My colleague will argue that new legislation is not necessary. He is wrong.  
解释：句子（6）在（4）和（5）描述问题后，简要总结出核心需求（需要更好的法律）。选项 D. In short,用于简要概括或引出结论，这里过渡到行动呼吁，并引出对反对意见的反驳。

7. (7) B. To summarize the main points, the Great Bustard has been successfully reintroduced to England. It is still being hunted, and it is threatened by agriculture. Without new laws, this beautiful creature will die out. And this time, it will be for good.  
解释：句子（7）是演讲结尾，总结主要观点（重新引入的现状、威胁和后果）。选项 B. To summarize the main points,正式用于总结全文要点，符合结尾语境，并重申（3）和（5）的内容以强化结论。


祝同学学习进步~