Answer:
1. La gata Fibi es grande y fea.
2. Ellos
3. Su amiga Matilda y Elena
4. nos gusta
Explanation:
1. Fibi is feminine with the subject, <em>La gato</em>, and must match with the feminine version of the adjective.
2. Mario and Ricardo are masculine names, so it matches with the masculine word of "them".
3. Ellas, is feminine, so they must match with feminine names such as Matilda and Elena such as the first option.
4. <em>Nos</em> is plural for both subjects, and gusta is used over gustan because it is a single object, the pink door, so it much match the singular verb.