--- Each of the students, working hard at his or her lessons, ___ to go to university.--- So do I.
He must have finished the work yesterday, ____ he ?
Is there a shop aroun ____ we can buy some toilet articles?
He must have lived here for 10 years, ____ he?
___ smoking here will be fined.
"Where is it?" "Where is ____? I don't know what do you mean?"