【2012 山东滨州】Mary, put on your coat, ______ you'll catch a cold.
I was________tired that I couldn’t go on walking.
The sweet smell of the flowers in the garden comes in_______the open window,making us feel in a good mood(心情).A.onB.withC.through
Did you know that the earth is home to________animals?
The little girl was________nervous that she couldn’t say a word in public.
—How long have Mr.and Mrs.Smith________?—For more than twenty years.