【题目】---Haven’t you finished the construction of the teaching building to be used next term?
--- Yes. My workers and I _____ on it for over nine months.
A. have worked B. have been working
C. worked D. had worked
在线课程【答案】C
【解析】
考查时态。句意：—你们还没有建好下学期要用的教学楼吗?—是的。我和我的员工花了九个多月的时间来做这件事。结合句意可知这里在讲一件过去的事情，所以句子用一般过去时态，故选C。