1,Nowadays with the development of our society,more and more hi-tech products_____(introduce)to our life.
2,Is it the years_____you worked in the factory _____have a great effect on your literary works?(填that,where或which)
3,It won't be long before he returns to his native land.这句话对吗?
4,When she was awake ,she found that she was lying on ____seemed to be a piece of stone.填that/what/which/it