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    33． the Department of Homeland Security identified more than 7,000 sensitive dates spanning the next 20 years, it did manage to rule out several dates as future 9/11s. A．Since B．Because C．Though D．When 【查看更多】

     

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            the Department of Homeland Security identified more than 7,000 sensitive dates spanning the next 20 years, it did manage to rule out several dates as future 9/11s.

    A．Since         B．Because           C．Though            D．When

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