This is top-secret work. In no circumstances ____ reveal what you know.
A. you will
B. you can
C. do you
D. must you
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Scarcely____ asleep when a knock at the door awakened her.
A. had she fallen
B. she had fallen
C. did she fall
D. she fell
____ man realized that the brain controlled our thinking.
A. It was not until the 18thcentury
B. It was the 18thcentury since
C. Not until the 18thcentury did
D. It was until the 18thcentury which
It was on the date_____ they went abroad
A. on which
B. when
C. that
D. which
Itwas not until the subprime loan crisis ____ 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 caused, had realized