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Livingandworkingintherelaystation(转播台)hassomeproblemsyoucan’timaginegettingwaterisnottheleast.A、fromwhichB、inwhichC、ofwhichD、bywhi

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Living and working in the relay station(转播台)has some problems you can’t imagine       getting water is not the least.

A、from which     B、in which     C、of which      D、by which

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C