The machine might break down someday in the future, ____, you can dial this number for help.
He fell in love with the beautiful scenery at the first sight, and _________ it ever since.
It is reported that two schools, ________ are being built in my hometown, will open next year.
Was it in the factory _____ you worked five years ago ____ you met your wife for the first time?
I was about to give up my effort to solve a problem __________ a good idea struck me.
When someone gets old they often go to live in a home with other old people ________ there are nurses to look after them.