单选题 When snow collects on top of a building during the winter, the weight sometimes weakens the construction and occasionally causes the roof to collapse.
A. selects B. scatters C. melts D. accumulates

【正确答案】 D
【答案解析】collect：集中、集合，和accumulate(积累、积聚、堆积)意思相近；select：选择、挑选；scatter：分散、消散、散播；melt：融化。