The above sentence changes to a passive voice, thus:
<em>"Their command of English should have increased considerably if sufficient time and attention were given by students to their work."</em>
The passive voice always follows this pattern: Object + Verb + By Phrase.
When the emphasis is not on the doer but the object of the action, the passive voice is used.
In the above sentence, the passive voice emphasized "their command of English" and "sufficient time and attention," which are objects of the sentence.
Students, who are the doers of the actions, were relegated to the background because the emphasis is not on the doers but the objects of the action.
Thus, the passive voice is always used when the object must be emphasized.
Learn more about the usage of the passive voice here: brainly.com/question/22047439
Answer:
I want get better grades in school so that I can get a good job in the future
The correct answer is A. omission to reduce support for Jones
He is omitting what is actually going on so as to persuade people that Jones is a bad person who would harm them.