Answer:
1. That's because she walks slowly.
2. She often works hard in Mrs. Potter's garden.
3. Perhaps it was too expensive.
4. Of course, he is a good player.
5. I know. They didn't play well.
6. I hope you will play well.
7. Oh, it was very hard.
8. Did he speak too fast?
Step-by-step explanation:
Both adjectives and adverbs are parts of speech used to modify (describe) other words. However, they modify different parts of speech.
Adjectives are words we use to modify nouns (e.g. red, beautiful, scary, funny). Here, you should use an adjective in the third, fourth, and seventh sentences (expensive - refers to the entrance to the Beacon Park, good - player, hard - test).
Adverbs are words we use to modify verbs, adjectives, and other adverbs (e.g. loudly, softly, fun, well). Adverbs should be used in the rest of the sentences (slowly - walks, hard - works, well - play, fast - speak).