When the boss ________ into the office, his secretary ________, and the accountant ________ on the phones. A. was walking / has been typing / has been talking B. had walked / was typing / h
When the boss ________ into the office, his secretary ________, and the accountant ________ on the phones.
A. was walking / has been typing / has been talking
B. had walked / was typing / had talked
C. walked / was typing / was talking
D. had been walking / had typed / talked