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Complete the sports commentator's notes about Buster, an enthusiastic but clumsy dog in an agility competition.
Buster is a happy dog, but he doesn't jump very _________________________. However, he runs really _________________________ when he sees a squirrel in the crowd!
The correct answers are well and fast.
Some adverbs are irregular and do not end in "-ly".
The adverb form of "good" is well (not "goodly").
The adverb form of "fast" stays exactly the same: fast (there is no such word as "fastly").