【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.