1In a room above the store，where a party ______，some workers were busily setting the table.
A．was to be held B．has been held
C．will be held D．is being held
解析：根据“some workers were busily setting the table”判断，聚会还没举行，应用将来时态，且整个句子用了过去时，所以此处用过去将来时态。故选A项。
答案：A
