Mrs Green took up the story at thepoint ____the thief had just made off with the jewels

填入下列横线处的词语，恰当的一组是(1)但等到他和长安的现实接触渐多，豪放的情绪也就______收敛，这中间他对于过去自由的生活感到无限的依恋。(2)有时酒酣耳热，主客间也仿佛暂时泯除了等级的______，彼此成为“朋友”。(3)杜甫看着这凄惨的景象，听着这悲凉的谈话，再也______不住他心头的痛苦了，他写出他第一首替人民说话的诗：《兵车行》。

下列各句中，表达得体的一项是（ ）

189. I tried to ____ in my speech we were all grateful for his help.

When I try to understand ________ that prevents so many children from being happy, there seem to be three causes.