读我国四条重要山脉走向图，回答以下问题。

在世界现存的6000多种语言中，超过1000种语言处于极度濒危或严重濒危状态。为促进语言文化的多样性，联合国教科文组织将每年2月21日定位“国际母语日”。下列对此说法不正确的是（    ）

下列命题中，是真命题的是（   ）

任务型阅读

    My name is George．I'm from England．Now I'm studying in Germany．I get to school at 7：30 every morning．I find many of my schoolmates come to school by bike．  ①   

    This is an interesting thing for me．In England people usually drive，take a bus or walk somewhere，for example，to school．In Germany, I often see people，even people over eighty years old going somewhere by bike．It makes me think：  ②   

My father gives the answer．We are living in Northern Germany．It is very flat(平坦的).So it is easy for people here to go somewhere quickly by bike .And it's cheaper than(比…….便宜)going by car or by bus．Also,it's good for the environment(环境)．

    I like riding bikes now．   ③    When I go back to England，I will ride more and ask my friends to ride with me．I think they will like tiding bikes，too．

根据材料内容完成下列任务。