The tide is, ______ , very high. A) at a time B) at times C) at the time D) at other time

The tide is, ______ , very high. A) at a time B) at times C) at the time D) at other time

The correct answer is B) at times.

The sentence would read: "The tide is, at times, very high."

"At times" means occasionally or sometimes, which fits the context of the sentence. The other options don't quite work grammatically or in meaning.