The boiler from excessive pressure of steam ________.
---- Do you know our town at all? -----No, this ________ the first time I _________ here.
Last Sunday, they arrived at the farm _____ they had never paid a visit before.
When______ a new word, you’d better_______ a dictionary.
_______ more attention, the cabbages ________ grown better.
It was announced that only when the fire was under control ____ to return to their homes.