He had written the book before he -

A had retired

B has retired

C will be retired

D retired

Solution

Correct Answer: Option D

- Before conjunction যুক্ত Past Perfect Tense এর ব্যবহার হলো Before এর পূর্বের বাক্য Past Perfect Tense হবে এবং Before এর পরের অংশ Past Indefinite বা Simple Past Tense হবে।

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