用life还是livesThey don't know that wasting time means wasting part of their own ____ .答案给的是life,为什么不填lives呢?

用life还是livesThey don't know that wasting time means wasting part of their own ____ .答案给的是life,为什么不填lives呢? 翻译,life,Don't take tome about life the rich don‘t understand the difficult life the poor havethe rich 指一类人，谓语用复数，谓语是understand吗？为什么没有用复数？还是谓语是have？ 填life还是lives?“wasting their own ＿＿（life）”这里该填什么,life还是lives?加了own用单数还是复数? 微笑面对生活用英语怎么说?是face to the life...?还是face the life .? I had to life（live） with my parents 中间是用life还是live? you don not marry non-life是什么意思 if my life don not have if my life don not have you 是peace life还是peaceful life. experience in life 还是 on life 呢 英语翻译easy life还是simple life合适 on my life 还是in my life? they influence our life.这个life应该是life还是lives but no ___were lost 用的是life 还是 livesbut no ___were lost用的是life 还是 lives Don't talk ( )don't play in chess ( )里用and还是or?Don't talk ( )don't play in chess ( )里用and还是or？ during his life 还是lifetimewhy 有关life的用法life做名词意思是生活的时候(不是生命啊)可数吗?那应该用our life还是our lives