Установите последовательность пропущенных в тексте слов.
The roof is a necessary component of practically every 1_______. It serves to protect the interior of the building from rain, snow, wind, and cold. There exist many types of 2_______, the main ones being sloping roofs and flat ones. It is a well-known fact that every roof should 3_______a covering. The type of covering of a roof mainly depends on the 4_______ of the roof and some other factors.