____ you were coming today, I’d have met you at the airport.
A. Have I known
B. I have known
C. Had I known
D. I had known
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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
___ he ill-mannered, ____ 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.
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
____ a machine been so efficient and accurate as the electronic computer.
A. More than ever before
B. In the past, there never has
C. Never before has
D. Formerly there never was
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