Question

the newcomen ____ one of the worlds first functional steam engines - used steam to create a vacuum that utilized atmospheric pressure to force a piston downward, moving in cycles of about twelve pumps per minute. which choice completes the text so that it conforms to the conventions of standard english? choose 1 answer: engine engine - engine, engine;

Explanation:

The text is a complete - thought sentence about the Newcomen engine. A comma is needed after "engine" to separate the main clause "The Newcomen engine" from the non - essential appositive phrase "one of the world's first functional steam engines".

Answer:

C. engine,