Answer:
Since the middle of the 20th century, scientists <u>have found</u> cures for many diseases. However, so far no one <u>has discovered</u>
Explanation:
those are the perfect tenses for (find) and (discover)
<u> A. by explaining the meaning of the text</u>
Interpreting is a way to clarify the content of a written work, event, person, or work of art, by explaining its meaning. Some teachers aim to evaluate the comprehension level of their students by asking them to interpret a piece of writing, often in an interpretive essay. In this type of essay, the student's task is to critically analyze the assigned written work, and offer an explanation of all the components of it, and its general meaning.
I don’t even understand what this is