这句英文的意思是什么?cover在里面应该怎么理解l sent him had helpedto cover his mounting medical bills

问题描述:

这句英文的意思是什么?cover在里面应该怎么理解
l sent him had helpedto cover his mounting medical bills

前面是不是少了个What?
我寄给他的东西帮助他偿还了巨额医疗费.
cover这里是偿还的意思