As the quality of the city’s air continues to give rise to ______, the residents are encouraged to set off fewer fireworks. 

I quite agree with you. We are of one ______.

The police managed to gain       through an upstairs window.

 It’s hard to imagine a large city without policemen, but such was the ______ in London in the early 18th century.

Our car had a _______ on the way to the airport last week.