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    So difficult it to work out the problem that I decided to ask Tom for advice. A. I did find B. did I find C. I have found D. have I found 【查看更多】

     

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        So difficult __________ it to work out the problem that I decided to ask Tom for advice.

    A. I did find   B. did I find

    C. I have found      D. have I found

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    So difficult _______it to work out the problem that I decided to ask Tom for some advice.

    A．I did find    B．did I find              C．I’ve found             D．have I found

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    So difficult ___it to work out the problem that I decided to ask Tom for advice.

    A. I did find   B. did I find   C. I have found    D. have I found

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    So difficult ______ it to work out the problem that I decided to ask Tom for advice.

    A．I did find B．did I findC．I have foundD．have I found

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    So difficult ___it to work out the problem that I decided to ask Tom for advice.

    A. I did find   B. did I find   C. I have found    D. have I found

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