Question

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 _______ .

Answer 1

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.

Answer 2

concrete

aqueducts

flushing toilets

Step-by-step explanation:

i just did it and got it right