Our game of basketball ______. We had been playing for about half an hour when it started to rain heavily.
【正确答案】 C
【答案解析】根据句意可知,interrupt所表示的动作发生在过去,所以应用一般过去时。另外,our game of basketball和interrupt为逻辑上的动宾关系,所以应用被动语态。故选C。