It was not until the subprime loan crisis(次贷危机) ____ great damage to the American financial system that Americans ____ the severity of the situation.
A. caused, realized B. had caused, realized
C. caused, had realized D. was causing, had realized
It was not until the subprime loan crisis(次贷危机) ____ great damage to the American financial system that Americans ____ the severity of the situation.
A. caused, realized B. had caused, realized
C. caused, had realized D. was causing, had realized
B
略