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Gas does accumulate in the mines around here.
A:increase
B:spread
C:collect
D:grow
B:spread
C:collect
D:grow
参考答案
参考解析
解析：本句意思：气体确实聚集在这附近的矿山里。accumulate积累，聚集。collect收集，积 聚；increase增加；spread展开，蔓延；grow增长。
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