Explanation:
Identify what parts of speech the underlined words are:
1. "Next moment, Mr. Toad was found seated **in** the car."
- Preposition: **in**
2. "As the familiar sound of the car **mastered** Mr. Toad and completely mastered him."
- Verb: **mastered**
3. "He **round** the yard and out through the arch temporarily suspended for Mr. Toad."
- Verb: **round**
4. "He **suspended** going."
- Verb: **suspended**
In the last sentence, it seems there might be a typo or an incomplete thought. If you could provide more context or clarification, I'll be happy to assist further.