There were two small rooms in the house, ____served as kitchen.
19. It’s dangerous to have the fire _______ at home all night long.
18. I decided to write about Chaplin, one of ______ films I had seen several years before.
17. Our attention was drawn to the eight-year-old girl who was _______ perfectly at the piano.
16. He made another wonderful discovery, __________ of great importance to science.
15. Great changes ______ in the city, and a lot of new buildings ______.