关于马克思主义政治经济学产生的条件,说法正确的是 ( )①经济危机的周期性爆发,资本主义内在矛盾的暴露,为科学揭示资本主义生产方式的本质及其发展趋势提供了可能性 ②欧洲三大工人运动表明历史进入了无产阶级独立开展政治斗争的新阶段,工人运动呼唤科学理论的指导 ③空想社会主义者的思想同古典经济学的理论成果一同成为马克思主义政治经济学的直接理论来源 ④黑格尔的辩证法和费尔巴哈的唯物主义是其理论来源
24. “May I go and play with Dick this afternoon, Mum?” “No, you can’t go out _______ your work is being done.”
23. In some countries, _______ are called “public schools” are not owned by the state.
22. “How long do you suppose it is _______ he left for Japan?” “No more than half a month.”
21. Mr Zhang is mild in character. He never shouts ____ he is very angry.
20. John shut everybody out of the kitchen _______ he could prepare his grand surprise for the party.