-_______ leave at the end of this month.-I don’t think you should do that until _________ another job.
—________ matters to do the job well —what you are or where you come from? —Neither. It depends on whether you put your heart into it.
----How unhappy your roommate looks! ----Yes,but he’s not willing to tell me what it is____ is troubling him.
It was along the Mississippi River _______ Mark Twain spent much of his childhood.
It was not until midnight __ they reached the camp site.
It was in New Zealand ___ Elizabeth first met Mr. Smith.