Answer:
1. The bike crashed into the house. (Fragment)
2. Crazy, pink flamingos flock together at the watering hole. (Fragment
3. (Leave it alone, complete sentence.)
4. (leave it alone, complete sentence.)
5. There are dirty footprints on the ceiling. (Fragment)
I gave a few sentence rewrites if you couldn't come up with any. Feel free to come up with your own if you don't like mine though. :)
The correct answer is The alligator slipped quietly into the water.
The first sentence does not agree since alligators should be a singular form, while the second and third are nonsensical because of lack of information.
D. engrossing is something attention grabbing, as in to be engrossed in something
Answer: The woman who gave this to me was very helpful