The sentence suggests that he was ready to get going after waiting a long time. The only answer choice that makes sense in that context is “eager," which means ready and excited to do something. To help you, "reluctant" means unwilling to do something and is an antonym, or opposite, of "eager," "enamored" means in love with, and "perplexed" means confused. 

If you learned that someone had stolen your bike you would likely feel angry. The correct answer is therefore “furious,” which means very angry. To help you, "invisible" means not able to be seen, "essential" means very important, crucial, or basic, "fragile" means easily broken or delicate, and "content" means happy with the way things are.

The context of the sentence suggests that the things she says are confusing and hard to figure out. This should lead us to the correct answer, which is “bewildering," an adjective that means confusing. To help you, "oblivious" means not aware, and "obvious" means easy to see or understand.

Global warming is something that might worry someone. The answer choice that most closely resembles worried is concerned, which means anxious, worried or troubled. To further help you, elated and ecstatic both mean very happy; haughty and arrogant are synonyms and both mean proud.

The context of this sentence tells us that it took the student a few days to finally finish his assignment. The answer choice that most closely resembles finish is complete. To further help you, abridge means make shorter; descend means go down; ascend means go up; mimic means copy.

Finding out you have head lice would likely be upsetting or worrying so the correct answer is distressed, which means upset. Furious could be a tempting answer choice, because it means very angry, but it is a bit too intense of a reaction to make the most sense. Thrilled and delighted both mean made happy.

A speaker who is articulate and persuasive is "eloquent."

"Hazy" is incorrect, because "hazy" means unclear and murky.

"Reliable" is incorrect. "Reliable" means dependable and consistent. It doesn't necessarily have to mean reliably articulate. 

"Intense" is incorrect. "Intense" means extreme, which doesn't have to mean "persuasive." Sometimes being too intense can scare people away.

"Pedestrian" is incorrect. In this case, "pedestrian" would mean boring and dull.

"Hazy" means only partially visible, not fully comprehended, or clouded by particles. By using context clues in the sentence, it becomes apparent that the missing word is the opposite of "clear." "Hazy" is the word choice that best fits. 

If one is "thrifty," one uses money carefully and not wastefully. In the context of this sentence, a person who could buy many outfits but spend only ten dollars would be considered "thrifty."

"Hazardous" means dangerous or potentially causing harm. Battling thieves and riding through a dark woods could both be considered dangerous activities; therefore, the context clues in the sentence point to "hazardous" as the best word choice.