Alright, I will help you with these exercises. Let's start with Exercise IV and then move to Exercise V.

Exercise IV

Instructions: Complete the sentence by inferring information about the italicized word from its context.

1. Because Barbara is an inconstant friend, Pete will most likely...

Explanation:
The word "inconstant" means not reliable or predictable; someone who changes their mind or feelings frequently.

Answer:
...be unsure about whether Pete can rely on her.

2. When the report notes that gas prices have increased exponentially, the class it includes probably...

Explanation:
The word "exponentially" means increasing very rapidly.

Answer:
...a significant increase in the cost of gas.

3. After the professor explains the complicated hypothesis, students will be able to...

Explanation:
The word "hypothesis" means a proposed explanation for a phenomenon.

Answer:
...understand the professor's proposed explanation.

Exercise V

Instructions: Fill in the blank with the word from the Unit that best completes the sentence, using the text we supply as a clue. Then, answer the questions that follow the paragraphs.

Answer:

Composing popular music is not only an art form, but a gift. Songwriters must tell a very detailed story with a beginning, a middle, and an end, and do it all within just a few minutes. On top of that, they must remember that the music should be appealing to the people who will listen to it. That means writing a song should solicit a lot of people understand or connecting a song with a great sound.