题目

－You seem to have lost your way, ___________? －I’m looking for Wangfujing Street.        A．What are you looking for                      B．Why so        C．Need help                                           D．Where are you going 答案：C5．先化简，再求值：$\frac{1}{x}÷（\frac{{{x^2}+1}}{{{x^2}-x}}-\frac{2}{x-1}）+\frac{1}{x+1}$，其中x=$\frac{1}{3}$．