Choose the correct option to complete the sentences. I didn't use to like running when I was at school, but I do now. 1. We ........... in the library when we heard the ambulance arriving. (were studing/ studied/had studied) 2. The restaurant was closed because there ............. a fire in the kitchen. (had been/would be/used to be) 3. They ............. sailing in the Mediterranean last summer. (used to go/ would go/ went) 4. What ........ while you were waiting for the rescue team? (did you do/ did you use to do/ had you done) 5. As children, we ........ in this river every day during the summer. ( swimming/ had swum/ would swim)