She spoke as though she (know ) all.
Solution
Correct Answer: Option B
As if/ as through -এর পূর্বের clause টি past tense -এ থাকলে এদের পরের clause টি past perfect tense -এ হবে । Past perfect tense -এর structure হলো sub + had + verb -এর p.p + extension । সুতরাং blank space এ had known বসবে ।
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