1.    A.skating       B. status         C.stadium        D. statue

\(\dfrac{\left(\dfrac{1}{6}+\dfrac{1}{10}+\dfrac{1}{15}\right):\left(\dfrac{1}{6}+\dfrac{1}{10}-\dfrac{1}{15}\right)}{\left(\dfrac{1}{2}-\dfrac{1}{3}+\dfrac{1}{4}-\dfrac{1}{5}\right):\left(\dfrac{1}{4}-\dfrac{1}{6}\right)}=\)

\(\dfrac{\dfrac{28}{31}:\dfrac{7}{31}}{\dfrac{8}{9}:\dfrac{4}{9}}\)=