Why do you speak in _________ a loud voice—-Because I want to make myself ________ clearly.

下列各句中加点成语的使用全都不正确的一项是①这篇文章病句每段都有，结构混乱，字迹潦草，如果文不加点的话，令人不能卒读。②他是我队的核心控卫，控球左冲右突，如入无人之境，球技已达到了炉火纯青的地步。③我非常喜欢笛子演奏，为了这次表演，我已经苦练半年，今晚我终于可以粉墨登场了。④他冒犯了法律的尊严，理应受到严惩。念他是初犯，且情节不很严重，就罪不容诛吧。⑤某些领导干部善于拉帮结派，编织自己的关系网，到头来却是作革自缚，害了自己。⑥有些辩士，时而信誓旦旦，时而巧设机变，虽是识时务，却坏人心术，为君子不齿。

______ your brother ______ volleyball yesterday——No, he went shopping.

Jack fell off the ladder yesterday, but he is all right now? —What a lucky dog! He _________ himself badly.

What do you think of the music teacher?- she is an elegant lady, she can be extremely difficult to work with