题目

______ the heart attack, Monica brought her doctor a bunch of flowers to express her thanks.    A. Surviving        B. To survive C. Survived             D. Having survived 答案：D函数f（x）=ln（-x2+3x+4）的单调增区间是A.[，+∞）B.（-∞，+）C.（-1，）D.（，4）