We’ll never give up working on the experiment (实验), ______ difficult it is.

He is very angry with his mother, because his mother always__________him with the best student.

Try to be more careful next time. Carelessness only________ mistakes.

依次填入下列各句 横线处的成语，最恰当的一组是①在义工联盟中，他不仅是发起人、带头者，更是义工精神的实践者、坚守者，时时处处都 ，亲力亲为。②不管日方如何 、绞尽脑汁、变换手法宣传自己的错误立场，都改变不了钓鱼岛属于中国这一基本事实。③他 地寻求国画艺术的发展道路，多方探索，力求变化创新，在挥毫泼墨中抒发画家丰富的思想感情。

think the green coat _________ her very well.–That’s right. Why not buy one for your daughter?