十九世纪中叶,美国资本主义经济发展需要大量的自由劳动力,缅因州关于反奴隶的大讨论,激发了比切斯托夫人的创作动机,写出了《汤姆叔叔的小屋》这部小说。小说在美国民众中引起强烈的反响,为美国废奴运动赢得200万同情者和支持者。材料体现了( )①经济、政治与文化相互作用、影响 ②思想运动是文化创新发展的源泉③先进文化对社会发展起着促进作用 ④文学作品可直接转化为物质能量
The safety of food has become one of the _________ problems in our daily life.
We must _______ what he is doing now and then we can take action.
—Do you know that old woman? — Yes, she is Mrs. Green. And she ____ leaves her house because she can’t walk far.
In the school talent show, Linda performed well and Ann did even.
— Are you free this Sunday? — Yes, I am. I have ________ to do.