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Review the time-traveler's journal entries comparing the past and the future. Select ALL the sentences that are grammatically correct.
The correct answers are In 1920, there were no flying cars and In 2120, there will be robots in every home.
There were is the correct past tense form for plural nouns (like "flying cars").
There will be is the correct future tense form for any noun (like "robots" or "a colony").
"There was no smartphones" is incorrect because "smartphones" is plural. "There were a colony on Mars" is incorrect because 2120 is in the future, so it needs "will be".