It was along the Mississippi River ______ Mark Twain spent much of his childhood _____ the story happened.A. which; that B. that; which C where; that D. that ;that
—Hold the ladder for me! —That’s______
I think I was at school,______I was staying with a friend during the vacation when I heard the news.
There were two boys in the lab,______did the experiment successfully.
After the new technique was introduced the factory produced cars in 1994 as the year before.
I am in______charge of the class which was in charge of my wife.