Select the CORRECT option to complete the sentence.

By the time he ______ at the station, the train had already left, and he ______ for the next one since then.

Select the CORRECT sentence that uses a conjunction to connect two clauses with different tenses, maintaining coherence and clarity:

Identify the sentence that contains a future tense verb:

Select the CORRECT option to replace the bold words in below sentence.

It's no secret that artificial intelligent (AI), specifically generative AI, has improved all the time.

Select the most appropriate option that corrects the underlined error in the given sentence.

By 2028, the company has operated in this market for fifteen years.