It is not profitable to provide bus services in districts where the population is widely

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(答案→)A. scattered
B. dismissed
C. separated
D. spread
解析：　　scattered是scatter的过去分词，也可作形容词用，（=lying in different directions; not situated together, wide apart）分散的，散布在各处的。Separate分开的，spread传播；摊开，dismiss解雇。