Ⅰ。 Phonetics (10 points)

　　Directions：

　　In each of following groups of words， there are four underlined letter combinations marked A， B， C and D. Compare 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. enough B. about C. touch D. young

　　正確答案是：B A

　　2.A. thirsty B. throat C. youth D. those

　　正確答案是：D

　　3.A. shut B. cut C. funny D. use

　　正確答案是：D

　　4.A. thanks B. pills C. news D. films

　　正確答案是：A

　　5.A. dear B. heart C. ear D. tear

　　正確答案是：B

　　6.A. births B. depths C. months D. mouths

　　正確答案是：D

　　7.A. election B. pronunciation C. question D. operation

　　正確答案是：C

　　8.A. hot B. home C. top D. off

　　正確答案是：B

　　9.A. may B. day C. stay D. Sunday

　　正確答案是：D

　　10.A. weigh B. eight C. seize D. daily

　　正確答案是：C