I kept looking at the man, wondering _______.


  1. A.
    whether I have seen him before
  2. B.
    whether I had seen him before
  3. C.
    that I had seen him before
  4. D.
    when I saw him before
B
這題考查賓語從句的時態(tài) ,因為是before強調(diào)的是過去的過去,要用過去完成時,wonder“想知道”后面應(yīng)該是疑問詞引導(dǎo)的賓語從句。選B。
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