.As reported in the essay by Prof. Brown, it is only in the most difficult circumstances ________ a man’s abilities are fully tested.
You should understand the traffic rule by now. You’ve had it ________ often enough.
When ________ imported goods,people are ________ about all the different labels on food these days.
What he said just now _____ me of that American professor.
When copying the paper,be careful not to ________ a single word.
Forty people got injured in a bus accident. Every ________ ambulance was rushed to the scene of the accident.