(E) To be skeptical is to feel and to express doubt about the truth of something; to be sure is to feel and express certainty.
SKEPTICAL: not easily persuaded or convinced; doubting; questioning
Indecisive: characterized by indecision; hesitating or vacillating
Hesitant: hesitating or undecided; vacillating; doubtful
Oblivious: forgetful or unmindful: usually with of or to
Euphoria: feeling of vigor, well-being, or high spirits

(E) A grouch is someone who is curmudgeonly (that is, argumentative, gloomy, and sarcastic); a sentimentalist is someone who is maudlin (that is, excessively soft-hearted or “mushy).
CURMUDGEONLY: a surly, ill-mannered, bad- tempered person; cantankerous fellow
GROUCH: a complaint
Irascible: showing or resulting from a quick temper or a fit of anger
Whimsical: full of or characterized by whims or whimsy OR oddly out of the ordinary; fanciful; freakish OR subject to sudden change; unpredictable
Egotistical: a person characterized by egotism
Altruist: of or motivated by altruism; unselfish

(C) A sigh is a particular kind of breath that often expresses the emotion of resignation (that is, acceptance of what can’t be helped). A gasp is a particular kind of breath that often expresses the emotion of surprise.
RESIGNATION: the act of resigning b) formal notice of this, esp. in writing
SIGH: to take in and let out a long, deep, audible breath, esp. in expressing sorrow, relief, fatigue, longing, etc.
Faith: a feminine name
Pray: to worship God, a god, etc., as by reciting certain set formulas
Surprise: to come upon suddenly or unexpectedly; take unawares OR to attack or capture suddenly and without warning
Gasp: to inhale suddenly, as in surprise, or breathe with effort, as in choking
Terror: a person or thing causing intense fear b) the quality of causing such fear; terribleness OR a program of terrorism or a party, group, etc. resorting to terrorism
Despair: to lose hope; be without hope:
Plunge: to thrust, throw, or force suddenly (into a liquid, hole, condition, etc.

(A) A brief is a legal document (prepared by an attorney for use in connection with a court case); a spreadsheet is a financial document (prepared by an accountant for use in business).
BRIEF: short in length
Spreadsheet: a computer program that organizes numerical data into rows and columns on a video screen, for computing desired calculations and making overall adjustments based on new data
Letter: a written or printed message to a person or group, usually sent by mail in an envelope
Administrative: of or connected with administration; executive
Formula: directions for preparing a medicine, a paint, a baby‘s food, etc. b) something prepared from such directions; often specif., a milk preparation for feeding a baby
Mathematical: rigorously exact, precise, accurate, etc. Also
Journal: a daily record of happenings, as a diary

(D) To be impregnable is to be able to withstand almost any kind of assault; to be immutable is to be unchangeable, and therefore able to turn away virtually any kind of alteration.
Immutable: never changing or varying; unchangeable
Alteration: the result of this; change
Intractable: not tractable; specif., a) hard to manage; unruly or stubborn b) hard to work, manipulate, cure, treat, etc.
Destruction: the cause or means of destroying