1、miss Gao left an hour ago(同义句转换)
Miss gao()()()()an hour ago
2、this factory opened twenty years ago(同义句)
this factory()for twenty years.
3、her mother has been a party memeber for three years(同义句)
her mother()the party three years()
4、the green family moved to france two years ago.(同义句)
()two years()the green family moved to france.