下列关于我国民族的叙述，正确的是（    ）

阅读下列短文，从每小题的三个选项中选出最佳选项。

    Hello, my name's Kitty. I have a big family. My grandparents are old. They are thin.

    David is my father. He is fat. He is a policeman(警察). This is my mother. Her name is May. She's tall and thin. She is a nurse. John is my uncle. He has a pair of glasses. He is a doctor. He can help people. Sue is my aunt. She has big eyes. She likes kids. She is a teacher. I have one cousin. His name is Peter. John and Sue are his parents.

①他们离开了“这片 gû fù____他们雄心壮志”的地方。

②啊，它已经老了许多呢，瘦了许多呢，昨日楚楚的容颜全然 tuìjìn____了。

③书的模样，到现在还在眼前，可是从还在眼前的模样来说，却是一部刻印都十分cû zhuô____。

④船舱鼓鼓的，又像一个rěnjùn bù jîn____的笑容。

头发乌黑通直、脸庞扁平的是  (      )

材料分析：
红军不怕远征难，万水千山只等闲。五岭逶迤腾细浪，乌蒙磅礴走泥丸。金沙水拍云崖暖，大渡桥横铁索寒。更喜岷山千里雪，三军过后尽开颜。              
———***《七律•长征》