—Bob! How is your project? I heard you started it last Friday, right?—Oh! I for it. But I haven’t decided when to do it.
A. have prepared
B. had prepared
C. have been preparing
D. was preparing
网友回答
A. have prepared
B. had prepared
(答案→)C. have been preparing
D. was preparing
解析：本句的含义为你的课题项目做的如何，我听说你上个星期五就开始了，对吗？我一直为此作准备，但我还没有决定何时开始，本题回答语表示现在完成进行，结构为have been+现在分词，故本题选C。