Wherever people live, they need to protect themselves (0) from the weather, and ever (1) since humans started to walk the Earth, they have lived in caves. To start with, they (2) made use of natural caves, but they soon ran (3) out of these. It then became simpler for them to create their own caves (4) or to build shelters using other materials or techniques. On volcanic islands, for example, people found the rock was soft (5) enough to dig into, and (6) there are places in the world where these artificial caves are still inhabited. Modern-day caves have some unexpected advantages. For anyone who has ever visited (7) them the benefits are immediately apparent: they will have found that the cave is isolated from noise and has a generally pleasant temperature. It is not too hot in the summer, while it stays warm in the winter. (8) What is more, a modern cave is likely to contain all the modern household gadgets that make life comfortable.
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LIVING IN CAVES
Wherever people live, they need to protect themselves (0) from the weather, and ever (1) since humans started to walk the Earth, they have lived in caves. To start with, they (2) made use of natural caves, but they soon ran (3) out of these. It then became simpler for them to create their own caves (4) or to build shelters using other materials or techniques. On volcanic islands, for example, people found the rock was soft (5) enough to dig into, and (6) there are places in the world where these artificial caves are still inhabited. Modern-day caves have some unexpected advantages. For anyone who has ever visited (7) them the benefits are immediately apparent: they will have found that the cave is isolated from noise and has a generally pleasant temperature. It is not too hot in the summer, while it stays warm in the winter. (8) What is more, a modern cave is likely to contain all the modern household gadgets that make life comfortable.