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A man does not know the difficulty of anything _____ he does it personally .

     A. although         B. if             C. because        D. unless

A man does not know the difficulty of anything_________ he does it personally.

A. although      B. if            C. because       D. unless

A man does not know the difficulty of anything _____ he does it personally .

     A. although         B. if                    C. because        D. unless

A man does not know the difficulty of anything_________ he does it personally.

A. although     B. if            C. because       D. unless

A man does not know the difficulty of anything_________ he does it personally.

A. although     B. if            C. because       D. unless