Obligation With "Have To" (Present And Past)

Explanation
The phrase "had to" indicates that there was a requirement or obligation for the person to go to Brazil with their parents. It implies that the person did not have a choice in the matter and had a compelling reason to go to Brazil.

Explanation
The correct answer is "doesn't have to" or "does not have to". This is because the phrase "doesn't have to" is used to express that something is not necessary or required. In the given sentence, it implies that Agustina is not required to practice tennis four times a week, indicating that it is optional for her.

Explanation
The correct answer is "did" because it is the past tense of the verb "do" and is used to form questions in the past tense. In this question, "did" is used to ask if the person studied biology for a test that occurred last week. The second option, "Did," is incorrect because it is not a complete sentence.

Explanation
The question is asking about the actions or requirements needed to become a great football player in the present. The correct answer is "do I have to," which is a correct formation of the question structure. The other options are incorrect because they either do not form a question or do not use the correct word order.

Explanation
Fish have a unique adaptation that allows them to swim efficiently without the need for any special equipment. They have streamlined bodies, fins, and a swim bladder that helps them control their buoyancy. This enables them to move through water effortlessly and without the need for any additional gear. Therefore, the correct answer is "doesn't have to" or "does not have to".