A．About 116 schools around the world now offer course materials free online to the public.
B．Open Course Ware only offers materials from graduate courses.
C．Visitors can learn the same things M.I.T. students learn, and they can receive credits toward a degree.
D．There are more visitors of the site from outside the United States and Canada.

A．Swedish.
B．Portuguese.
C．Chinese.
D．Thai.

A．The influence of European popular music on non-Western music.
B．The musical background of the director of the Broadway version of The Lion King.
C．The types of music used in the Broadway version of The Lion King.
D．Differences between the music of the film version and the Broadway version of The Lion King.