Answer:
6. The grass is like a green carpet for the golfers.
7. The inside of the car was like a refrigerator.
8. Beth became like the dance as the music played
9. His stomach was like a bottomless pit.
Explanation:
A metaphor is a comparison of two things without using the words like or as, and a simile does use those words.
All of these are metaphors, so they need to be changed to similes. This can be done by adding the words "like" or "as" and also any additional phrases to make the sentences make sense.
Changing to similes:
6. The grass is like a green carpet for the golfers.
7. The inside of the car was like a refrigerator.
8. Beth became like the dance as the music played
9. His stomach was like a bottomless pit.
I used like for this change, but "as" and additional phrases can also be used.