--Why did the police ______________the crowd?---Because the president’s car __________in the street.
In the reading-room, we found Winifred ____at a desk, with her attention _____on a novel.
In the questionnaire, the subjects are questioned whether they____banning cars in the city centre.
____ to give up smoking, he threw away his _____ cigarettes.
By the time he retires, professor Baker _____ for almost forty years.
I would appreciate ______, to be frank, if the goods could be delivered as soon as possible.