She made it through the class.Perhaps she thanked the young man; she is not sureWhenever you say something to a person cruel or kind---you have no idea how long the words will stay.(这句为什么用stay 而不用leave)
问题描述：
She made it through the class.Perhaps she thanked the young man; she is not sure
Whenever you say something to a person cruel or kind---you have no idea how long the words will stay.(这句为什么用stay 而不用leave)
答
因为how long 在从句中作表语，故选系动词stay ,
答
她把这一点贯穿了整节课.或许她是感谢这个年青人；但是她不很肯定.
第二题,楼上回答得很到位.