Although all of the choices would make a complete sentence, the choice "ordered pizza at home," makes the most sense because it has to do with what happened in the beginning of the sentence. The other choices have no connection to the pizza party being cancelled, so do not make as much sense.

Using the context clues of the sentence where it says, "creates no pollutants." we can predict that the missing word should be something good or positive. The only positive choice is "benefits." The rest of the words would not make sense in the sentence because they would suggest that the wind power is doing something negative. 

Let's divide this sentence into two parts. First, we're told that the teacher usually wanted her days to be "unique and exciting." However, the conjunction "but" lets us know that we're looking for the opposite. In other words, sometimes the teacher looks forward to days that are not unique or exciting. Of the answer choices, a little bit of "variety" is similar to uniqueness; "distinctiveness" can be eliminated for the same reason. Even "amusement" is too close in meaning to "excitement," so we are left with "monotony," a word that refers to repetition of tedious or boring tasks. So, the teacher generally wished for excitement, but occasionally looked forward to a dull or "monotonous" day.

Notice the nature of the contrast. The sentence is contrasting Cecelia's time at work with the other time that she has. Our "leisure time" is our free time—when we can do what we want because we want to do it. Since leisure time best contrasts with being at work, this is the best answer for this question.

In this sentence, it is made clear that the student has an excess of energy and as a result is pacing about his room. This indicates that he is "restless," meaning that he is not able to relax himself. "Restless" is therefore the best way to complete this sentence.

In this sentence, the clue words as to what to fill the blank with are "making her feel alive and full of energy." The word that goes in the blank should have a meaning similar to this. "Invigorates" means to inspire or give one a lot of energy or passion. Therefore, "invigorates" is the correct answer.

When a smell masks other aromas, it does so because of its intensity. The best word that conveys the intensity of a smell is "pungent." Something that is "pungent" has an aroma that is very strong and prevents other scents from being detected.

Given the context of the sentence, we know that Marshall had studied a lot for his test, and scored well on practice exams, but still scored poorly. This difference between his expectations and reality would cause him to be very surprised, or "shocked." While he might be upset, the words "outraged" and "horrified" are too strong, and "annoyed" is too weak. "Unimpressed" is not appropriate. Therefore, "surprised" is the best answer.

Here, given that Jonathan is going to pay off his car every month, he is paying it off piece by piece. To pay something off in installments means to pay something off incrementally, one portion at a time. Therefore, installments is the correct answer. 

Long-winded means to talk at length in a tedious way. Given that Jeff takes ten minutes to tell a story that most people could tell in a fraction of that time, the best word to fill the blank would be one that indicates he takes a long time to tell his story. Long-winded is therefore the best fit.