<h2>1) Correct answer:</h2><h3>C) estaba caminando</h3>
The imperfect progressive is used when talking about what a person <em>was doing.</em> One of the main uses this tense is to talk about an action that was interrupted in the past. This tense is formed with the verb estar (conjugated in the imperfect) plus a verb in present participle. From the options, the one that fits the requirements is C) since estaba matches the subject pronoun yo in the imperfect. On the other hand, caminando is the present participle of the verb caminar. Finally:
<em>Estaba caminando </em><em>y me caí</em>
<h2>2) Correct answer:</h2><h3>A) estaba estudiando </h3>
Since Marcos can be replaced by the subject pronoun él, that is, this sentence matches the third person singular, then we must conjugate the verb estar in the imperfect and matching this person as well. So the correct conjugation is estaba and the present participle of the verb estudiar is estudiando. Finally, the correct option is A) and we can write:
<em>Marcos </em><em>estaba estudiando </em><em>cuando llegué a su casa</em>
<h2>3) Correct answer:</h2><h3>C) estaban jugando</h3>
Since ellos is the subject pronoun that matches the third person plural, we must we must conjugate the verb estar in the imperfect an matching this person as well. Thus, the correct conjugation is estaban and the present participle of the verb jugar is jugando. Finally, the correct option is C) and we can write:
<em>Ellos</em><em> estaban jugando </em><em>futbol cuando se lastimaron</em>
<h2>4) Correct answer:</h2><h3>B) María estaba cocinando cuando ella se cortó</h3>
Recall that we said above that it's common to use the imperfect progressive to talk about an action that was interrupted in the past. In this way, estaba cocinando matches the imperfect progressive because estaba stands for the third person singular in the imperfect and cocinando is the present participle of the verb cocinar. Therefore, we must choose a verb in the preterite tense to complete the sentence, which is cortó. We choose the preterite because this tense talks about actions that were completed at a certain moment in the past. Finally, the sentence means:
<em>Maria was cooking when she cut herself</em>
<h2>5) Correct answer:</h2><h3>A) me lastimé el tobillo cuando estaba jugando futbol</h3>
Let's explain why this is the correct option. First of all, me lastimé stands in reflexive form, that is, me is the reflexive pronoun for the first person singular and lastimé matches the first person singular in the preterite. We use a reflexive pronouns with a verb to point out that a person carries out an action <em>to </em>or <em>for himself/herself. </em>So this conjugation tells us that the sentence is given in the past. On the other hand, estaba jugando stands for the imperfect progressive. Finally, we can translate this sentence as follows:
<em>I hurt my ankle when I was playing soccer</em>
<h2>6) Correct answer:</h2><h3>B) tú estabas escribiendo</h3>
This sentence is given in the imperfect progressive and we know it because the part of the sentence estabas escribiendo. Thus, tú translates into you and estabas escribiendo means were writing because estabas matches the subject pronoun tú in the imperfect and escribiendo is the present participle of the verb escribir,
<h2>7) Correct answer:</h2><h3>C) to express an ongoing action in the past that is interrupted</h3>
As we said above, this is the main use of this tense. So this is formed by the imperfect form of the verb estar plus a present participle. Therefore, we can write this as the following formula:
Imperfect of the verb estar + present participle.
So the present participle tells us that an action is in fact an ongoing action.
<h2>8) Correct answer:</h2><h3>D) a program of scholarships for Ecuadorian students</h3>
Eugenia María del Pino was born in Quito, Ecuador, in 1945 and is a developmental biologist from the Pontifical Catholic University of Ecuador (Pontificia Universidad Católica del Ecuador) and was the first Ecuadorian person chosen by the United States National Academy of Sciences. In this way, she helped in the establishment of a program of scholarships for Ecuadorian students for the Charles Darwin foundation in the Galapagos islands.
<h2>9) Correct answer:</h2><h3>B) waved albatross</h3>
The Galapagos Islands is an archipelago of volcanic island located in the Republic of Ecuador. In these islands there are a vast number of endemic species that also were studied by Charles Darwin. The waved albatross is a native species in the Galapagos islands and belongs to the class: aves. This bird has a white head and a gray body. Furthermore, the beak of this bird is yellow.
