Answer:
The four words are:
"During the Chemistry experiment..."
Explanation:
The above words are the four words that make up the prepositional phrase.
A prepositional phrase is known to be a group of words which has a preposition with its object and other words that modify the object. Prepositional phrases can actually modify a noun or a verb.
Examples of common prepositions that actually begin prepositional phrases in sentences are: <em>to, about, during, behind, after, for, of, at, before, under, with, over, with, </em>and <em>by</em>.
The above sentences begin with a preposition and it is answering the question of when the smoke filled the class.
900 meters/ 1.5 meters per second = 600 seconds or 10 min
Let's start with an obvious one. He certainly is not a coward. He was willing to take on a dog that was ferocious; in contrast, Heathcliff makes the comment that the "cowardly children also crept forward..." That quoted phrase is somewhere near the very end.
Your first example of yellow underlining is a wonderful example. Heathcliff is quite common and he would use common English. He characterizes Cathy as being gentile and not given to saying anything contrary to her upbringing.
I would note that Heathcliff followed grumbling execrations and vengeance. [an execration is a threat denouncement or curse. Again Heathcliff is showing his common upbringing. Cathy would choke before she would utter such things. This one is kind of iffy. You could omit it. It is by inference something that shows that Heathcliff is different].
Your second underlined statement is correct. It characterizes Heathcliff as a robber and a thief and part of a lowlife gang. You could go on. Robert does not hesitate to make his feelings known and adds to what you underlined.
Your third underlined statement is correct as well. I have added two but your examples are fine.
Who marks this? Make an appeal if you get it wrong. Interpreting literature is that way. This is not exactly a factual question and the only way to answer it is to compare Heathcliff to someone else. I chose Robert and Cathy. Write your instructor and provide some of the evidence you have provided here.
"Use an appropriate level of formality."
Questions and disagreements are allowed to happen in effective interactions. However, formality is very important for effectiveness.