Spanish! i need ! quick? ! fill in the blank with the correct form of the imperfect tense.
los pájaros (volar) sobre los árboles.
question 16 (fill-in-the-blank worth 2 points)
fill in the blank with the correct comparative of más or menos.
el tigre es que el burro.
question 17 (fill-in-the-blank worth ; fill in the blank with the correct form of the imperfect tense.; and you so much ! **10 pnts** yo (trabajar) los fines de semana.

For Question 15, you would use "volaban" because it is in the "ellos" form.
 (3rd person plural: ending -aban; the sentence is:

Los pájaros volaban sobre los árboles. )

For Question 16, the answer would be "menos", because "tonto" means dumb. Tigers or "tigres" are not as dumb as a burro.

For Question 17, you would use "trabajaba" because it is the correct way to write it in the "yo" form.

It's first person singular.

For imperfect, you generally add -ba- and another ending:

yo ... -ba
tu ... bas (e.g . tu volabas, tu trabajabas)
ellla ...-ba
nosotros ... -bamos
ustedes/ellos -ban