MBA CDOE (USOL) Panjab University MBA Entrance Exam with MCQ Answers 2017

Practice Mode:
98.

Find out the right option to replace the underlined word/words in the question to make it a correct sentence.

I am tired as I am working since 7 O'clock in the morning.
A: I was working
B: I have been working
C: I had been working
D: I will be working

The answer is: B