The sentence suggests that the author feels very sure of his/her success. When someone is sure of themselves, we call them confident. To further help you, apprehensive and anxious are synonyms that both mean worried; menacing and threatening are synonyms that both mean intending to cause harm or scary.

The sentence tells us that Jenna’s coach thought she was not trying hard enough; this suggests that Jenna’s attempts were lazy or not good enough. The answer choice that most closely resembles lazy is “lackadaisical,” which means half-hearted, lazy. To further help you, "bemusing" means confusing; "whimsical" means silly; "menacing" means scary or threatening; "absurd" means ridiculous or silly.

The context of the sentence suggests that the correct answer means easily broken. Something that is easily broken is described as “fragile.” To further help you, "robust" and "sturdy" are antonyms of "fragile" and both mean firm and strong; "miniscule" means very small.

The sentence suggests that the wealthy man was loved because of his willingness to share his time and money. To be "generous" means to be giving; "generously" means kindly or liberally. To further help you, when you give something "begrudgingly" you give it without wanting to; "miserly" means not charitable; "smoothly" means not bumpy, without imperfections; "jaggedly" means sharply. "Smoothly" and "jaggedly" are antonyms. 

Hercules is a mythical hero. Someone who does things that a hero would do is called "heroic," so "heroic" is the correct answer. None of the other answer choices make sense in the sentence: "malicious" means evil; "vengeful" means seeking revenge; and "wanton" means random.

We call the feeling of desiring something that someone has and that you want "envy" or "jealousy," so when my friend purchased my favorite car I felt "envious."  As for the other answer choices, "despondent" means feeling sad and hopeless, and "jubilant" means happy.

The second clause of the sentence tells us that the ability of whales to communicate over thousands of miles of oceans is not common, or beyond ordinary. This means that the correct answer is "extraordinary," which means amazing or out of the ordinary. None of the other answer choices make sense in the blank: "mundane" and "banal" are synonyms of one another and both mean boring; "mundane" and "banal" are also antonyms of extraordinary. Also, "irate" means angry.

The author’s autograph is totally different from all other copies; this suggests it is fake or not real. The answer choice that matches this definition is “bogus.” To provide further help, “authentic” and “genuine” both mean real and are antonyms of “fake” or “bogus.” “Ceremonial” means done for purposes of tradition or ceremony, and “sanctimonious” means self-righteous. 

Jimmy’s mother is worried that her son is not eating; this suggests he looks terribly skinny. The answer choice that describes the physical appearance of someone who is skinny and not eating enough is “gaunt.” To provide further help, “comely” means cute, “nostalgic” means having a fond memory of the past, “corpulent” means fat and is an antonym of “gaunt”, and “lilliputian” means very tiny.

From the context of the sentence, you know that Gary needs to take “immediate” and something like “immediate” action. The correct answer is “drastic,” which means quick and desperate. To provide further help, “sluggish” means lacking energy, “measured” means deliberate or calculated, “unhurried” means not in a rush and is an antonym of “drastic," and “frivolous” means wasted or pointless.