Lots of medicine as well as equipment such as tents _______ offered to the area since the earthquake occurred.A.has beenB.have beenC.is beingD.are being
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A解析考查主谓一致和时态。Since通常与现在完成时连用。本题得主语是Lots of medicine，是不可数名词，后面应该使用单数形式，根据句意应该是被动的关系。故A正确。句意：自从地震以来，很多药物和帐篷这样的设备已经被提供给这个地区。