Plz : )

20. rebeca esta un libro

a. leendo
b. leyó
c. leyendo
d. leido

23. which is not true about the imperfect tense?

a. it shows a completed action in the past
b. it sets up a scene in the past
c. it describes an interrupted action in the past
d. it tells about habitual actions in the past

26. how would you say "my cousins were getting along badly during the party"?

a. mis primos se llevaban mal durante la fiesta
b. mis primos se llevan mal durante la fiesta
c. mis primos llevaron mal durante la fiesta
d. mis primos se llevó mal durante la fiesta

This sentence stands for the present progressive tense. This tense is used to talk about something that is happening now. To form the present progressive we use the following formula:

verb estar + present participle

Regular Present participle of ar verbs = verb stem + ending ando

Regular Present participle of er and ir verbs = verb stem + ending iendo

Finally:

Rebeca esta leyendo un libro

The imperfect tense is used to describe past habitual actions or to talk about what someone was doing when they were interrupted by something else. In general, the imperfect is used to talk about past actions, conditions, or events that occurred regularly or frequently or that were in progress in a moment in the past. To show a completed action in the past we use the preterite tense.

This sentence stands for the imperfect. So llevaban is the conjugation of the verb llevar for the third person singular in the imperfect. On the other hand, mis primos translates into my cousins, and party is fiesta. Finally, the sentence my cousins were getting along badly during the party is equivalent to mis primos se llevaban mal durante la fiesta in Spanish.

b.   divertidos because she always said how fun it was