Question

complete the sentence with the correct plural. trolley charles j. van depoele, who invented electric in 1885, invested much of his time and money experimenting with electricity; in 1878, he created a lighting system for an evening circus performance.

Explanation:

The plural form of "trolley" is formed by adding -s. In English, most nouns form their plurals by simply adding -s when the word ends with a consonant followed by -ey.

Answer:

trolleys