解析：句意：不劳无获；毕竟，世上没有免费的午餐。no such thing相当于not such a thing。

　　8．-More and more people have got to know the importance of the English study. Believe __it__ or not, about six people in ten in this city are able to speak English.

　　-That's great.

　　解析：句意：--越来越多的人已经开始意识到学英语的重要性。信不信由你，这个城市中十个人中有六个能够说英语。--真是太好了。believe it or not "信不信由你。"

　　Ⅱ.完成句子

　　1．There __is_no_such_man__ in our neighborhood.

　　我们社区没有这样的人。

　　2．London Olympic Games __are_recognized_as_a_great_success__.

　　伦敦奥运会被认为是一个了不起的成功事件。

　　3．Vegetables are __playing_an_important_part_in__ helping people keep healthy.

　　蔬菜在帮助人们保持健康方面起着重要作用。

　　4．__As_we_all_know__，the Bird's Nest is so beautiful that it attracts tourists at home and abroad.

　　众所周知，鸟巢太美了，吸引了国内外的游客。

　　5．She has just __bought_the_same_car__ as her brother did last year.

　　她刚买了一辆和她弟弟去年买的一样的小汽车。

　　6．The public requested that company __should_not_make_the_young_students_work__ for them.

　　公众要求这家公司不应该让年轻学生为他们工作。

　　7．-So many celebrities are crowding to Hong Kong. What has happened?

　　--那么多的名人都在涌向香港。发生了什么事。

　　-__This_is_because__ the famous singer is to hold a wedding soon.

　　--这是因为那位著名歌星马上要举行婚礼了。

8．The person in charge of the meeting commanded that