...period "in which" cats have been domesticated may be quite short, it has definitely had...放到句首 變成 in which cats have been domesticated. 合併步驟三 把整句插入 第一句 重複的 period...
我想你要的大概是回答吧 As humans learned to domesticate animals and raise crops, they started to settle down! ...
Because to domesticate is a kind of memory . having loved should be fine.