精选优质文档-倾情为你奉上2011年成人高等学校招生全国统一考试专升本英语第一卷(选择题,共125分)I . Phonetics (5 points)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 identify the one that is different from the others in pronunciation. Mark your answer by blackening the corresponding letter on the Answer Sheet.1. A. grandB. gravityC. gratitudeD. grateful2. A. theaterB. threat C. thread