Since we know that the empty fuel tanks are "releas[ed]...into space when no longer needed," we need to pick out an answer choice that means something like "release." Since "jettison" is a verb meaning "throw or drop something from an aircraft or ship" or "abandon or discard someone or something that is no longer wanted," "jettison" best fits the context of the sentence and is the correct answer.

We can infer that because the kids are likely to have thrown snowballs at each other, we need to pick out a verb that means something like "throw (something) at." "Pelting" is a verb which means either "attacking (someone) by repeatedly hurling things at them" or "repeatedly hurling (something) at someone or something," and because "pelting" best describes how the kids threw snowballs at each other, "pelting" is the correct answer.

We can infer that we need to pick out a verb for the blank that means something like "act as an intermediary in," because the sentence declares that the third party was involved "with the hopes that by acting as an intermediary, the third party could help the warring countries reach a peace treaty and stop the fighting." "Mediate" is a verb that means "intervene between people in a dispute in order to bring about an agreement or reconciliation," and because "mediate" best describes the action of the third party in the sentence, "mediate" is the correct answer.

The students weren't in a hurry, therefore they probably walked slowly to class. So, we need to pick out an answer choice for the blank that means something like "walked slowly." "Ambled" means walked at a leisurely pace, so "ambled" is the best answer choice.

Sarah uses visual art and poetry as a way of expressing her feelings or conveying her feelings.  Thus, convey is the best word to get across the idea of revealing her feelings through her art.

From the context of the sentence, you know that the answer choice must describe how the explorers left on their journey. That rules out "encamped," "fortified," and "garrisoned," which all mean settled down in one place. "Dreaded" means feared, so it cannot be the correct answer either. The correct answer is “embarked,” which means set off or began a trip.

From the context of the sentence, it is clear that the local store would be in support of the politician's campaign. The correct answer is “endorse,” which means to publically offer support for an individual or a cause. To further help you, "supplant" means replace; "juxtapose" means compare and contrast; "discourage" means to cause someone to lose confidence.

Since Gregory is said to be have become "extremely angry," it is fair to assume that his response to John is less than kind. Therefore, the options "interrogate" and "question" are far too mild for our needs. The verb "interrogate" means question (as in "interrogation," which is a process of questioning, often formal and for legal and/or criminal reasons). The word "recant" (meaning deny or renounce) does not apply at all. Likewise, "decimate" means exact a great amount of killing or destruction. This word implies physical violence, which we cannot here assume. The word "berate" means means criticize nastily, which best describes Gregory's angry response to the questions being raised by John.

While the verb, "to flounder," is almost certainly unrelated to the fish species, as a homonym the connection can help you remember the definition. If a flounder were to be out of the water for too long he would start to flounder, or flop about and struggle. "Rallied" and "flourished" would have nearly the opposite meaning.

Tony did things to get rid of his pain. "Alleviate" means to sooth, so it fits best in the blank. "Exacerbate," "amplify," and "accentuate" are all words that mean that his pain would be increased. "Delegate" means to give responsibility to.