____ did he realize that he had made a mistake.
A. Upon entering the classroom
B. Only after entering the classroom
C. After he had entered the classroom
D. As soon as he entered the classroom
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It was not until she had arrived home ____ her appointment with the doctor.
A. did she remember
B. that she remembered
C. when she remembered
D. had she remembered
It was the date_____they went abroad.
A. when
B. which
C. that
D. on that
It’s only through practice ____ one will be able to swim skillfully.
A. what
B. who
C. that
D. which
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
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