74.The underlined word "mingled" in the last paragraph most probably means________. (A) simple (B) mixed (C) sad (D) happy

29.They _______ on the program for almost one week before I joined them, and now we________ it as no good results have come out so far. (A) had been working; are still working (B) had worked; were still working (C) have been working; have worked (D) have worked; are still working