55.What is the purpose of publishing Twain's autobiography?
A、To supplement other biographies.
B、To help readers to understand Mark Twain.
C、To introduce Mark Twain's works.
D、To expose new discoveries about Mark Twain.
Directions:In each of the following groups of words,there are four underlined letters or let-ter combinations marked A,B,C and D.Compare the underlined parts and iden-tdtify the one that is different from the others in pronunciation.Mark your answerby blackening the corresponding letter on the Answer Sheet