-How long has the United Nations __________?-__________1945.
_____ the website of the Fire Department in your city, and you will learn a lot about firefighting.
Between the two parts of the concert is a break, _____ the audience can buy ice-cream.
The prize will go to the writer _____ story shows the most imagination.
While ____ in tea with that dealer, Mr. Smith had himself ____.
——Are you going to take part in the speech contest?——____________. It’s too good an opportunity to miss.