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:

選B。根據(jù)“分詞短語作狀語，其邏輯主語須與主句的主語保持一致”的原則，因主語the present situation與look at 之間為被動關(guān)系，故答案為B。

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