孙中山的新三民主义成为国共两党合作的政治基础，因为它（ ）

材料一  科学工作者将一种矮秆（抗倒伏）但不抗锈病的小麦与另一种高秆（不抗倒伏）但抗锈病的小麦作亲本进行杂交，后代中出现了矮秆抗锈病，矮秆不抗锈病，高秆抗锈病和高秆不抗锈病四种类型，选矮秆抗锈病类型进行繁殖培育，经若干代后，便获得了矮秆抗锈病的小麦新品种。

材料二  科学家利用返回式卫星搭载普通青椒种子，返回地面后再进行选育，培育成果实个大，肉厚，口感好，产量高的太空椒。

    My grandpa often goes for a____in the park. He never loses his way.

    But yesterday, a police car____him home. A police officer told (告诉) me that my grandpa was____in the park.

    When the police officer went away, I asked grandpa, "What's____with you today?" "Nothing, I just felt____and I didn't want to walk home. So I called the police and they took me home."