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Choose the word or phrase the best completes each sentence. Romans developed ______ , which allowed engineers to build complex structures and roads. Romans supplied water to their cities by building ______ . Roman engineers invented the worlds first _______ .

Respuesta :

Answer:

concrete

aqueducts

flushing toilets

Explanation:

i just did it and got it right

Answer:

1. Romans developed CONCRETE, which allowed engineers to build complex structures and roads.

2. Romans supplied water to their cities by building AQUEDUCTS.

3. Roman engineers invented the worlds firsts FLUSHING TOILETS.

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