One-room schoolhouses can still be found in areas where there are no other schools for ma

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A. disposed
B. deserted
(答案→)C. isolated
D. abandoned
解析：　isolated 孤立的。Deserted被遗弃的；空无一人的；abandoned丢弃的，如；abandoned cars(因报废而丢弃的汽车)。Dispose of sth. 处理掉某物：He disposed of his old car .（他把旧的汽车处理掉了。）意为卖掉或扔掉等。