Questions 28-30 Choose the appropriate letters A-D and write them in boxes 28-30 on your answer sheet. *

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问题 Questions 28-30
Choose the appropriate letters A-D and write them in boxes 28-30 on your answer sheet.

*

选项 A、the four divisions were carefully selected to suit a specific programme.
B、each division was told to reduce its level of productivity.
C、the staff involved spent a number of months preparing for the study.
D、the employees were questioned about their feelings towards the study.

答案C

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