有人大代表指出，提升国家文化软实力，应该成为国家的发展战略。建设好我国的文化事业和产业，弘扬民族文化，对我们保持民族凝聚力、培养和重塑民族文化自信、自立于世界民族之林意义重大，这一论断的依据是（  ）

①文化越来越成为综合国力竞争的重要因素

②优秀文化是社会发展的根本动力

③一个民族必须物质和精神都富有

④文化是民族凝聚力和创造力的重要源泉

(A)

    Li Hong is a middle school student. She is a Young Pioneer. Liu Ying is in her class. She is a Young Pioneer, too. They go to school at seven every day. They don't go by bus. They have most of their classes in the morning. On Tuesday afternoon, they have two hours of sports. School is over at four in the afternoon. They do their homework at home. Sometimes they like to play football or watch TV after school.

    On Saturday afternoon they go to an old woman's house. She is about seventy. The two girls clean her room and carry water for her. They also buy things for her. They give the old woman a lot of help.