问题补充：
Lots of medicine as well as equipment such as tents offered to the area since the earthquake occurred.
A. has been
B. have been
C. is being
D. are being
答案：
(答案→)A. has been
B. have been
C. is being
D. are being
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。
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