Kate on her new novel, which is supposed to e out next month.
A. was working
B. had worked
C. will be working
D. has been working
网友回答
A. was working
B. had worked
C. will be working
(答案→)D. has been working
解析：D 考察时态。句义：凯特一直在忙着写她的新小说。因为下个月应该就要出版了。选现在完成进行时，表示一个动作从过去开始一直持续到现在，而且还可能持续下去。故D正确。