成考专升本英语模拟试题I. Phonetics (5 point )Directions:In each of following groups of words, there are four underlined letters or letter combinations marked A, B, C and  D. Compare the underlined parts and identify the one that different from the others in pronunciation, Mark your answer by blackening the corresponding letter on the Answer Sheet.1.  A.coach  B.float  C.broad  D.throat2.  A.riddle  B.ripen  C.privilege  D.primitive3.  A.decision  B.comprehension  C.extension  D.pension4.  A.brother  B.thri ...