Question

read the passage. then answer the question. skyscraper technology the first skyscrapers were built 200 years ago and were only 10 to 20 stories tall. they were made of thick masonry, or stone, walls. then elevators were invented, and iron replaced stone as the building material. skyscrapers could now be 50 stories high. people moved to cities, and the need for space increased. people then learned how to produce steel. truly tall buildings were now possible. steel was lighter and stronger than iron and could be made in large quantities. complete the sentence. when iron replaced stone, it means that iron stone in the building. took the place of was painted on went over

Explanation:

The phrase "replaced" in the passage means "took the place of". This is a common collocation in English.

Answer:

took the place of