James had teaching at the university for more than a year before he left for Asia.

Options

A. Was taught
B. Had been taught
C. Had been teaching
D. Has been teaching

Answer

C

Explanation

The most appropriate phrase to replace the given phrase in bold to make the sentence grammatically correct is "had been teaching". It is to be noted past perfect continuous tense is used for ongoing continuous events over a period of time before another action or event in the past. These must be continuous verbs, and cannot be actions that are still happening in the present. Hence, considering the given rationale option (c ) becomes the most suitable answer choice.