The course _______ for introducing multicultural America ranks first in the list of Popularity Courses among students this term.  

—How did you sleep last night? —A sound sleep. Never slept ______.

After breakfast, little Tony went to school by bicycle as ______.

We all know that paper burns in  _________ .

Published in 1974，the book was a(n) ________ success and was soon translated into thirteen foreign languages.