A. MULTIPLE CHOICE  I .Mark the letter A, B, C or D on your answer sheet to the word whose underlined part differs from the other three in pronunciation in each of the following questions. 1.  A. aware     B. cast     C. craft     D. carve 2.  A. sauce     B. steam     C. sugar     D. stew II . Mark the letter A, B, C or D on your answer sheet to the word that differs from the other three in the position of primary stress in each of the following questions. 3.  A. vacation     B. delicious     C. excursion     D. holiday 4.  A. invent     B. interact     C. develop     D. control III. Mark the letter A,B,C or D on your answer sheet to indicate the underlined part that needs correction in each of the following questions. 5. If they use more cars, atmosphere will be more pollute.                  A              B                        C                  D 6. I can help you look in your sick mother while you are on business.        A                B                                    C                       D