when does having more cease to add noticeabiy to human satisfaction?请翻译及语法解释

having为什么是动名词
cease什么意思?还是不怎么明白

When does it rain money? What How When Who Which Where Does 翻译:when does the library open? When does the winter vacation begin? when does scoot usually ___(get) home? when does he usually take a shower does anyone know when mammals first appeared on earth ? When does train reach the station? Please go and ______. Could you tell me when does she plane leave?改错 What does everyone take off last when going to bed?