在下面①②③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30 个字。

 中华民族五千年的文明史，   ①   。东汉末年，曹操慷慨赋诗“老骥伏枥，志在千里。烈士暮年，壮心不已”，淋漓抒写了诗人  ②   。一千三百年前，李白曾吟咏“大鹏一日同风起，扶摇直上九万里”，表达了他  ③   。“忧劳可以兴国，逸豫可以亡身，自然之理也”。在《新五代史· 伶官传序》中，欧阳修总结了后唐庄宗既得天下又失天下的原因，感喟小自一人、大至一国，无不以安逸而衰亡，以理想而勃兴。

在1925年1月莫斯科政府召开的一次会议上，一位农民代表向政府提出：“你们号召我们改进耕作，实现机械化。这样我们就会得到发展，我们的收入就会增加，我们将有更多的马、牛和机器，到那时你们会怎样呢？”得到的回答：“我们将把你作为富农加以剥夺。”由这一回答可知，当时的苏联政府

    “Traveling to China seems like traveling to another world. Its many famous scenic attractions impressed me ____ (great),”an American said. The following is ____ he wrote on his website.

    My friends and I had a family visit in Xi'an,____ old city with a long history in China. The hosts were retired or stayed at home without a job, and they were friendly to ____ (visit) from different countries coming their homes.

    We ____(taste) the true home-cooked dishes in the home of the family that we visited. For in-homing dinner, the host would prepare a list of menus in advance (提前). Our tour guide asked ____ (we) for advice about the food, so the host would try to cook what we wanted ____ (eat) at his home. We just enjoyed the locally cooked dishes. It was quite a different and exciting experience.

    Many foreigners enjoy ____ (learn) how to make Chinese dumplings. We were also ____ (offer) a general cooking class in the local family. The host taught us to make dumplings step by step with lots of patience. And we didn't need to pay any money ____this. Travel China Guide offers this kind of service free of charge.

    The family visit in Xi'an was a good chance for us to get to know Chinese people's daily life.

食物与空气的共同通道是（  ）