As a boy Mark Twain used to play practical jokes _____ all friends and neighbors.A:onB:

________ is known to the world, Mark Twain is a great American writer.A、WhoB、ThatC、As

The pen name Mark Twain came from_____A．his father"s experience as a boatmanB．his friends

______, by Mark Twain, is a popular 1876 novel about a young boy growing up on the Mississ

______ is known to the world, Mark Twain is a great American writer.A．WhoB．WhichC．AsD．It

Samuel Clemens ________ as Mark Twain was one of the most famous American writers.A.to k

______ is known to the world Mark Twain is a great American writer.A.AsB.WhichC.ThatD.Who