---Where is your report of this month?---Oh sorry,I______ to email to you.
----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.
----Where did you get to know her? ------It was on the farm ____we worked.