Tom ________ in the library every night over the last three months.
A. works
B. worked
C. has been working
D. had been working
Tom ________ in the library every night over the last three months.
A. works
B. worked
C. has been working
D. had been working
C
解析:句意:“在最近的三个月里汤姆每晚都在图书馆里工作。”由“over the last three months”可知,该句应用现在完成时,由句意可知,动作发生于过去,一直持续到现在,故用现在完成进行时。故选C项。