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35. Sales of CDs have greatly increased since the early 1990s, when people_____ to enjoy the advantages of this new technology.

    A. begin       B. began      C. have begun   D. had begun

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34.  ________ is often the case, we have worked out the production plan.

    A. Which       B. When      C. What      D. As

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33. A man is being questioned in relation to the ________ murder last night.

   A. advised         B. attended     C. attempted    D. admitted

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