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 Answer Sheet I.

　　1.A. machine              B. headache              C. chemistry         D. character

　　2.B. piece                B. receive               C. relief            D. scientist

　　3.A. months               B. mouths                C. paths             D. clothes

　　4.A. machine              B. attention             C. major             D. China

　　5.A.flood                 B. books                 C. other             D. double

　　Ⅱ。Vocabulary and Structure （ 15 points ）

　　Directions：

　　There are fifteen incomplete sentences in this section. For each sentence there are four choices marked A，B，C and D. Choose one answer that best completes the sentence and blacken the corresponding letter on Answer Sheet I.

　　6.