Directions:In each of the following groups of words,there are four underlined letters or letter 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 answer by blackening the corresponding letter on the Answer Sheet。
A、blew
B、crew
C、sew
D、Jew
52.According to Paragraph 1,which of the following statements is TRUE of Mark Twain?