My( )sister works in a hospital and she is a nurse 括号里填什么?

My( )sister works in a hospital and she is a nurse 括号里填什么?
My( )sister works in a hospital and she is a nurse 括号里填什么?

My( )sister works in a hospital and she is a nurse 括号里填什么?
楼下说的很正确 确实是如此 望楼主采纳丫.younger or elder