Although I often send e-mails to Tom,I have never seen him____
问题描述：
Although I often send e-mails to Tom,I have never seen him____
答
二楼不对,have 和 seen 是一伙的,后面那个空have是影响不到的.
就是动词原形reply
虽然我经常发Email给汤姆,可我从来没见他回过.