By the time Genghis Khan died in his early sixties, he ____ the largest contiguous empire the world had yet se…

Question

By the time Genghis Khan died in his early sixties, he ---- the largest contiguous empire the world had yet seen, ---- thousands of miles from the Sea of Japan to the Caspian Sea.

Accepted Answer

had created / stretching — 'By the time' geçmişteki bir ana kadar tamamlanmış eylem ister; bu yüzden 'had created' gerekir. İkinci boşluk imparatorluğu niteleyen kısaltılmış bir ilgi cümleciğidir ('which stretched' → 'stretching') ve etken biçim alır. 'To stretch' amaç bildirir; 'having stretched' ise gereksiz bir zaman önceliği kurar.