【英语题】选择合适的单词,并用其正确形式填空

【英语题】选择合适的单词,并用其正确形式填空
root overseas homeland ancestor memory
The______of the plant go deep into the ground.
I have lots of happy_______of my time in this city.
I have already visited the place where my ________lived.
He was happy to return home after living ________for two years.
Though they live abroad happily,they miss their _______now and then.