单选题
They had to stop the production line for nearly two hours after a problem was discovered and the workers had to wait until they ______ instructions from their superiors.
【正确答案】
B
【答案解析】本题需选择以instructions from their superiors(上级领导的指示)为宾语的动词。将备选答案一一代入后，分析全句。根据句意，工人(workers)要接受上级(superiors)下达的指示(instructions)，故(B)received最恰当。