—Not yet. I ________ too busy to apply for an appointment, so I didn’t go to Shanghai last week.

A. was B. have been C. had been D. would be

【答案】C

【解析】句意：——你得到美国签证了吗？——还没有，我过去太忙以至于没有申请，因此我上周没有去上海。根据后句时态可知，表示“过去的过去”应该用过去完成时。