依次填入下列句子横线处的成语最恰当的一项是（ ）①胡歌坐下来看剧本 时 ，等到他表演，他仔细揣摩人物心理、台词，完美演绎了“梅长苏”这个角色。②卢嘉川不说话了，他好像陷入沉思的状态中，正襟危坐， ，苦苦地思索着什么，回忆着过去发生的一切。③那时候，知识的总量还没那么大，如果你 几十年，就可把所学的那个专业的门类全部拿下。

He was chosen to be a volunteer for the Yangzhou Expo.—Great! No one speaks English _______ him.

His schoolbag _____ his baseball are on the sofa,____ his clock is not.

She didn’t come to the party last Sunday. ________， she must have made the party more exciting.

Fear is something that you are born with. You can’t________ yourself of it completely but you can ________ certain fears under certain conditions. [ ]