题目

－How is that, Joan?     －Yeah, it’s from the boss. She _________ first, whether she likes it.     A. shall go    B. ought to have gone     C. should go     D. must have gone 答案：A甲计划用若干个工作日完成某项工作，从第三个工作日起，乙加入此项工作，且甲、乙两人工效相同，结果提前3天完成任务，则甲计划完成此项工作的天数是A．8B．7 C．6D．5