From the dates _________ on the gold coin, we decided that it was made five hundred years ago.

—How unhappy your roommate looks!—Yes, but he's not willing to tell me what it is _______ is troubling him.

_____ wants to study well must learn things _____.

 My parents used _____ they had to get a new car for my brother.

When the girl learnt that her boy friend was ____ in the earthquake, she _____.