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一道英文题冠词的Ourneighbors,()Blacks,have()goodknowledgeofcomputersandoftenhelpussolvecomputerproblems.填冠词,可不填,

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一道英文题 冠词的
Our neighbors,( ) Blacks,have ( ) good knowledge of computers and often help us solve computer problems.填冠词,可不填,
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