am改成are.
因为rather than 连接两个名词或代词作主语时时,谓动的形式与前一个名词或代词相一致,
即坚持就前原则
You,rather than I ,are wrong.是你而不是我错了.改成: I don't know what to do with it./I don't know how to dealwith it .因为:do with / deal with 处理; 但do with同what连用 ;deal with 同how连用.