_______you have seen both fighters，_______willwin?


  1. A.
    Since；do you think who
  2. B.
    As；whoyou think
  3. C.
    When；whoever
  4. D.
    Since；who do you think
D
since引導(dǎo)原因狀語從句，as也可以；但其后的雙重問句語序應(yīng)是“疑問代詞+一般疑問句”，故B項和A項應(yīng)予排除。
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根據(jù)所給句子的意思，填上合適的單詞，并注意其正確形式, 首字母或中文已給出。

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