You mustn’t lend the bicycle to (others).为什么这里用others而不用other?I met some (other) tourists in the cave besides members of our group.为什么这里用other而不用others?She is going to have(another) baby.为什么这里用another而不用one?这句话翻译过来是什么意思?Is there(someone) moving about downstairs?I heard (somebody) falling.为什么第一个空格不用any而用someone?为什么第二个空格不用some而用somebody?It’s impossible to remember (everyone).为什么这里不用everything而用everyone?