【急】英语高手请进

1.visited
2.finishes 应该用第三人称单数,因为这是一个让步状语从句
3.lucky后面没有接doing的用法,只有be lucky to do sth 或者是 lucky with sth
4.have kept 句子后面说是 all the time 所以应该用完成时,表示从过去到现在一直持续发生

1.This is the first time that he have visited such a magnificent palace.
2.He'll go to see you when he has finished his homework. (finish/has finished/finished/will finish)
3.be lucky ___ doing sth.(in/on/at)我只知道有to do,不好意思
4.Bus fares have kept going up all the time in the past few years; complaints can be heard everywhere.(have kept/kept)