Group projects usually require each person of the group to participate, so we can say that they usually require "contributions," or things done for a project, from each group member. ("Contribution" can also mean something donated.) As for the other answer choices, "difficulties" are obstacles; "awareness" is perception or recognition; "judgments" are assessments or evaluations; and "verification" is the process of seeing whether or not something is true.

Turning on one's headlights in a severe rainstorm is something someone does to be cautious and safe. Based on this, "precautions," are needed in order to safeguard against the weather. "Risks" are chances; "tasks" are jobs; and "situations" are events or circumstances.

The answer choice that makes the most sense would relate to the smell of the candle. The answer choice that makes the most sense is "aroma," which means smell or fragrance. None of the other answer choices make sense in the blank: "abode" means home; "garment" means piece of clothing; "sanctuary" means safe place; and "rigor" means difficulty or thoroughness.

Let's dissect this sentence, starting with the second part. At the moment, the hoop "was in thirty small pieces." John and his brother needed to do something with these pieces before they will be able to play with their new sports equipment. We can quickly see that they needed to put the pieces together. The only word that describes the act of putting pieces together is "assembly," which is our answer.

Being the first African-American in the MLB, Jackie Robinson paved the way for future players of diverse backgrounds to play professional baseball. "Pioneer," defined as a person who is an early leader in a certain area, is the best answer choice.

Whatever noun goes in the blank, we know that it needs to be something that would help a teacher take attendance on a field trip. So, we can infer that we need to pick out a word that means something like "a list of names." "Roster" means a written list of the names of people in a certain group, so it is the correct answer because it best fits the sentence's context. As for the other answer choices, they don't make sense in the blank: "itinerary" may look like a good answer because a teacher likely has an itinerary on a field trip, "itinerary" means schedule, not "list of names," so "roster" is the better choice. Similarly, a "program" is a series of planned events, and "pet" means animal kept for fun and companionship.

The best answer choice is relic since it indicates that the vase is an antique object.

We can infer from the sentence that the subject heard a noise in the hallway, so we can narrow down possible answer choices to "clamor," which means "a loud continuous noise," and "whisper." Since the noises described were loud and not made by people, "clamor" is the better answer choice, and the correct answer.

If a teacher writes out assignment instructions and is strict about students following these rules, it means that they are constraints or restrictions.

An "oasis" is a fertile spot in the middle of a desert that usually contains water, so it is what explorers would hope to find if they needed water in a desert.

Incorrect answers:

"Exhibit" means a public showing, such as an exhibit at a museum.

"Avalanche" means a slide of a large mass, such as snow or rocks, down a the side of a mountain, as in the sentence, "The skier triggered an avalanche when he knocked a large chunk off ice off the top of the mountain."

"Underpass" means a passage beneath something, as in the sentence, "The highway is too dangerous to cross, so engineers dug an underpass underneath it for pedestrians." In the context of this sentence, the explorers could try to look for an underpass, but it would not help them find water. The key words in the sentence are that the explorers are "thirsty and in search of water," so the answer should have something to do with water.