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থিম নির্বাচন

আপনার পছন্দের থিম বেছে নিন।

He_______ as a teacher before he became a lecturer

A. have worked
B. had worked
C. was worked
D. works
E. have been worked
সঠিক উত্তরঃ B. had worked
Explanation:

When there are two events in the past: the earlier event should be in past perfect and the later event should be in simple past. Had worked is the appropriate option here.