It’s only through practice ____ one will be able to swim skillfully.
A. what
B. who
C. that
D. which
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I can hardly hear what he is saying, and ____
A. so can all the other people
B. so can hardly all the other people
C. nor can all the other people
D. nor all the other people can
This is top-secret work. In no circumstances ____ reveal what you know.
A. you will
B. you can
C. do you
D. must you
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
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