in which sentences fast used as adverb?

The cars on the overpass moved fast -the fast car drove over bridge-the battle couldn’t hit the fast pitch-the clock is 10 minutes fast-
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my answer=The cars on the overpass moved fast

Right.

thanks

Correct! "Fast" is used as an adverb in the sentence: "The cars on the overpass moved fast."

Yes, you are correct. In the given sentences, the word "fast" is used as an adverb in the sentence "The cars on the overpass moved fast."

To identify an adverb, it is important to look for words that modify verbs, adjectives, or other adverbs. In this case, "fast" is modifying how the cars moved, indicating the speed at which they were traveling.