Respuesta :
1.
What can be inferred about the time period of the passage in question is that personal computers were not the norm among students. This can be seen in the following examples: "with my backpack full of notes about my essay and borrowed books", "after months of note-taking, I was eager to compose my thesis. By reading these sentences, it is possible to say that the student narrating is really eager to use the computers, yet he is not able to do it since "a makeshift list had been added for people awaiting a turn at a computer".
2.
President Reagan presents a substantiated opinion since he quotes an expert. He provides his opinion together with evidence supporting his idea. His thoughts about freedom being the key in achieving progress are also those of Mikhail Lomosov.
3. I believe that the author's word choice help express the tone of the excerpt in the sense that the negative connotations of the words "dust", "aching", and "weary" give the excerpt a tone of tiredness. The passage tells how the mole thoroughly cleans his little home, a really exhausting task to complete, and this is highlighted by the word choice. According to the dictionary Merriam Webster, "weary" means "exhausted in strength, endurance, vigor, or freshness".
4. Clauses can be either independent or dependant. The first ones are known as main clauses, whereas the latter are considered subordinate clauses. The main clause expresses a complete meaning and can exist on its own. On the contrary, the subordinate clause cannot express a complete meaning on its own. It can't stand alone without the main clause because it strictly depends on it to give a complete meaning. Its role is "inferior" in terms of the semantics of the sentence .
Subordinate clauses can be nominal, adjectival or adverbial. In "the list with all the ingredients is on the kitchen table", we can identify an adjectival clause telling something about "the list". It is a PP (prepositional phrase) modifying the NP (nominal phrase) "the list". Therefore, the information representend by the PP should not be important in terms of the meaning so as to understand the rest of the sentence. In this way, we could remove the PP and the sentence should be complete --> "The list is on the kitchen table". The sentence still makes sense after having removed the PP. Therefore, A is your answer.