they searched for hours, but ____be found.
A. at no time could the missing book
B. nowhere could the missing book
C. nowhere the missing book could
D. at nowhere the missing book could
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____ he illmannered, ____the laziest and the most irresponsible creature you could ever hope to meet.
A. not only is...but he is also
B. not only is...but also
C. not only is...but also is he
D. not only...but also
____left unguarded.
A. at no time the gate
B. at no time was the gate
C. at no time the gate was
D. at no time did the gate
____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
____ a machine been so efficient and accurate as the electronic computer.
A. more than ever before
B. never before has
C. in the past, there never has
D. formerly there never was
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