单选题 Accustomed to ______ trees, I had no difficulty ______ the top.
A. climb ... reaching B. climbing ... to reach
C. climb ... to reach D. climbing ... reaching

【正确答案】 D
【答案解析】考查固定搭配。be accustomed to+v-ing为“习惯于……”；have difficulty(in) +v-ing意为“做某事有困难”。