Need with this spanish assignment only failed it 20 times

which of these animals is the longest?

la tortuga
la orca
el cangrejo
question 2(multiple choice worth 1 points)
es bonita.

esto
esta
este
question 3(multiple choice worth 1 points)
which of these animals is the smallest?

el tiburón
el delfín
el cangrejo
question 4 (fill-in-the-blank worth 1 points)
fill the blank with the correct demonstrative adjective.

voy a comprar vieja. (this)

answer for blank 1:

question 5 (fill-in-the-blank worth 1 points)
fill the blank with the correct demonstrative adjective.

son alumnas. (these)

answer for blank 1:

question 6 (fill-in-the-blank worth 1 points)
fill the blank with the correct demonstrative adjective. (these)

me gustan bonitos.

answer for blank 1:

question 7 (fill-in-the-blank worth 1 points)
fill the blank with the correct demonstrative adjective.

son alumnas. (those)

answer for blank 1:

question 8 (fill-in-the-blank worth 1 points)
fill the blank with the correct demonstrative adjective.

voy a comprar de misterio. (this)

answer for blank 1:

question 9 (fill-in-the-blank worth 1 points)
en español, the “sand” es

answer for blank 1:

question 10 (fill-in-the-blank worth 1 points)
en español, the “wave” es la ?

answer for blank 1:

question 11 (fill-in-the-blank worth 1 points)
fill the blank with the correct demonstrative adjective.

pez es feo. (that)

answer for blank 1:

Question 1: Which of these animals is the longest?

Answer 1: la tortuga.

Translation 1: ¿Cuál de estos animales es el más longevo?

Translation 1: the turtle.

Question 2: _________arena es bonita.

Answer 2: Esta arena es bonita.

Translation 2: This sand is beautiful.

Question 3: Which of these animals is the smallest?

Answer 3: el cangrejo.

Translation 3: ¿Cuál de estos animales es el más pequeño?

Translation 3: the crab.

Fill the blank with the correct demonstrative adjective.

Question 4: Voy a comprar _________canasta vieja. (this)

Answer 4: Voy a comprar esta canasta vieja.

Translation 4: I'm going to buy this old basket.

Question 5: ___________chicas son alumnas. (These)

Answer 5: Estas chicas son alumnas.

Translation 5: These girls are students.

Question 6: Me gustan __________ peces bonitos.(These)

Answer 6: Me gustan estos peces bonitos.

Translation 6: I like these beautiful fish.

Question 7: ___________chicas son alumnas. (Those)

Answer 7: Esas chicas son alumnas.

Translation 7: Those girls are students.

Question 8: Voy a comprar _________libro de misterio. (this)

Answer 8: Voy a comprar este libro de misterio.

Translation 8: I'm going to buy this mystery book.

Question 9: En español, the “sand” es la _________.

Answer 9: En español, the “sand” es la arena.

Translation 9: In Spanish, the "sand" means "la arena".

Question 10: En español, the “wave” es la ________ ?

Answer 10: En español, the “wave” es la ola.

Translation 10: In Spanish, the "wave" means "la ola".

Question 11: __________ pez es feo. (That)

Answer 11: Aquel pez es feo.

Translation 11: That fish is ugly.