Not only ____interested in a football but ____beginning to care about it.

A．the father is ,his family are

B．.the father is , ishis family

C．is the father ,his family are

D．is the father is ,his family is

材料：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。——毛 * * 《七律长征》

请回答：

（1）红军长征原因是什么？

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（2）红军长征途中经历了哪些艰难险阻？

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（3）你认为今天的我们应该学习红军长征的哪些精神？

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