It was not until later _________ the man discovered that he had been c

It was not until later _________ the man discovered that he had been cheated by salesgirl.   

• A. A. when
• B. B. that
• C. C. before
• D. D. while

Tạm dịch: Mãi đến sau đó thì người đàn ông mới phát hiện ra rằng mình bị cô gái bán hàng lừa gạt.

=> Cấu trúc: It was not until + ...... + that + clause: mãi đến sau này thì .....