the steep mountains he had no difficulty reaching the top.A. Having accustomed to climb B

问题补充：

the steep mountains，he had no difficulty reaching the top.

A. Having accustomed to climb

B. Having accustomed to climbing

C. Accustomed to climb

D. Accustomed to climbing

答案：

A. Having accustomed to climb

B. Having accustomed to climbing

C. Accustomed to climb

(答案→)D. Accustomed to climbing

解析：考查形容词固定搭配。固定搭配: be accustomed to sth/doing sth习惯某事；习惯做某事；本题使用形容词短语accustomed to climbing对句子的主语进行修饰说明。句意：习惯于攀登陡峭的大山，他到达山顶没有任何的困难。故D正确。