Question

1) Use the correct form of the verb ser or estar:

Answer 1

Below are the answers: 
1. Mi amiga es colombiana.
2. Tú eres policía.
3. Ellas estan muy tristes.
4. Ustedes no tienen hambre.
5. La escuela tiene muchos estudiantes.
6. A mí me gusta escuchar música.

Hope the answers helps. 

Answer 2

1) Correct answer:

es

Here we use the verb ser as description, talking about the essential quality that describe a person just as the nationality. So es is the conjugation of the verb ser that matches the third person singular in the simple present. This sentence stands for this person because mi amiga can be replaced by ella. Finally, we can write and translate this sentence as follows:

Mi amiga es colombiana (My friend is Colombian)

2) Correct answer:

eres

Here we use the verb ser as ocupation and this talks about what someone does for a living or as a hobby. Therefore, eres is the conjugation of the verb ser that matches the second person singular (tú) in the simple present tense. Finally, we can write and translate this sentence as follows:

Tú eres policía. (You are a police man)

3) Correct answer:

están

Here we use the verb estar as emotion and this is used to express what a person is feeling at a certain moment. Thus, están is the conjugation of the verb estar that matches the third person plural in the simple present. Finally, we can write and translate this sentence as follows:

Ellas están muy tristes (They are very sad)

4) Correct answer:

tienen

First of all, this is a negative sentence. Negations using no is the most basic type of Spanish verb negation. To make a sentence negative, just place the word no before the conjugated verb. Here the conjugated verb is tienen that comes from the verb tener and is its conjugation for the second person plural in formal form (ustedes). Finally, we can write and translate this sentence as follows:

Ustedes no tienen hambre  (You aren't hungry)

5) Correct answer:

tiene

Here we must use the conjugation of the verb tener for the third person singular in the simple present, which is tiene. By the way, the simple present tense is used to talk about habitual actions or routines. This tense is also used to describe things that happen now or in the near future. Finally, we can write and translate this sentence as follows:

La escuela tiene muchos estudiantes (The school has many students)

6) Correct answer:

me gusta

Me is the indirect object pronoun that matches the first person singular. An Indirect Object Pronoun is a person that receives the action of a verb indirectly. Its purpose is to tell you to whom or for whom something is done. On the other hand, since after the blank comes an infinitive verb (a verb ending in ar), then we must choose the conjugation of the verb gustar for the third person singular. Finally, we can write and translate this sentence as follows:

A mí me gusta escuchar música (I like to listen to music)