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    8、 (2011年浙江金华十校联考)Not until the press reported the pollution________why the water supply had been cut off.

    A．people did know                   B．people had known

    C．had people known                       D．did people know

    8、解析：选D。考查倒装句和时态。Not until置于句首时，主句要用(部分)倒装结构，由此可以排除A、B两项；另外，根据reported可知C项时态不正确。

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     (2011年浙江金华十校联考)Not until the press reported the pollution________why the water supply had been cut off.

    A．people did know                   B．people had known

    C．had people known                       D．did people know

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