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4 . ______at in this way, the present situation about birds flue doesn’t seem so disappointing.

  A. Looking           B. Looked

  C. Having looked     D. To look

B


解析:

选B。根据“分词短语作状语,其逻辑主语须与主句的主语保持一致”的原则,因主语the present situation与look at 之间为被动关系,故答案为B。

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