I COULD HAVE CHANGED MY FLIGHT IF ...YOU WERE TOO BUSY TO MEET ME A...

Lớp 9 Tiếng Anh ĐỀ THI HỌC SINH GIỎI LỚP 9 VÀ ĐÁP ÁN

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8. I could have changed my flight if ...you were too busy to meet me at the airport.

A. I knew B. I’d have known C. I know D. I’d known