Accustomed to the steep mountains, he had no difficulty reaching the top． A．clim

 Accustomed to ________ the steep mountains,  he had no difficulty reaching the top．

A．climbing                                                   B．climb

C．having climbed                                          D．have climbed

试题答案

【解析】选A。考查动词的形式。句意：他习惯于攀爬陡峭的山，所以毫无困难地到达了山顶。be accustomed to “习惯于”，后接动词的-ing形式。