**Rule: Understanding Idiomatic Expressions.** The idiom 'a fly in the ointment' refers to a small detail or flaw that spoils an otherwise enjoyable or perfect situation. A person who is 'always looking for' such a thing is a pessimist or a nitpicker. Option (b) is the correct definition. Option (a) is a literal interpretation. Option (c) describes the opposite (a silver lining). Option (d) describes a personality type that would not look for flaws.

**Rule: Understanding Idiomatic Expressions.** The idiom 'go down in flames' means to fail suddenly, completely, and spectacularly. A corruption scandal is a common cause for a political career to end in such a disastrous way. Option (a) is the correct definition. Option (b) and (d) are literal misinterpretations. Option (c) is the opposite.

**Rule: Understanding Idiomatic Expressions.** The idiom 'to have an axe to grind' means to have a private motive or grievance that fuels one's actions or arguments. Being fired from the company provides a strong personal motive for having a grievance. Option (b) correctly defines this situation. Option (a) and (c) are literal interpretations. Option (d) is the opposite.

**Rule: Understanding Idiomatic Expressions.** The idiom 'see eye to eye' means to be in full agreement with someone. Reaching a final agreement on a contract after 'weeks of negotiation' signifies that the two sides are now in accord. Option (c) is the correct definition. Option (a) and (d) are literal misinterpretations. Option (b) is the opposite of the idiom's meaning.

**Rule: Understanding Idiomatic Expressions.** The idiom 'a house of cards' refers to a plan, structure, or argument that is unstable and can easily be destroyed. The fact that the case 'collapsed' when one piece of evidence was removed shows its inherent weakness. Option (c) is the correct definition. Option (a) is the literal object. Option (b) is the opposite. Option (d) is an unrelated interpretation.

**Rule: Understanding Idiomatic Expressions.** The idiom 'brass neck' refers to extreme boldness, audacity, or shamelessness (cheek). Asking for a raise after being caught for misconduct is a prime example of such behavior. Option (a) is the correct definition. Option (b) and (c) are literal misinterpretations. Option (d) is the opposite of having a brass neck.

**Rule: Understanding Idiomatic Expressions.** The idiom 'miss the boat' means to lose an opportunity by being too slow to act. By not applying for the job in time, the person lost the chance to be hired. Option (b) correctly defines this situation. Option (a) and (c) are literal interpretations. Option (d) is the opposite outcome.

**Rule: Understanding Idiomatic Expressions.** The idiom 'wet behind the ears' refers to someone who is immature and lacks experience, like a newborn animal that is still wet. The need for 'a lot of training' supports the idea of inexperience. Option (c) is the correct definition. Option (a) is a literal misinterpretation. Option (b) is the opposite. Option (d) is a different character flaw.

**Rule: Understanding Idiomatic Expressions.** The idiom 'sell like hot cakes' means to be sold very quickly and successfully. The fact that the tickets 'sold out in minutes' is a clear example of this. Option (b) is the correct definition. Option (a) is a literal interpretation. Option (c) is incorrect. Option (d) is the opposite of the idiom's meaning.

**Rule: Understanding Idiomatic Expressions.** The idiom 'go their separate ways' means to dissolve a relationship, partnership, or association. In the context of countries with 'political disputes', it signifies the end of their cooperation. Option (a) is the correct definition. Option (b) is a literal meaning but not the figurative one intended. Option (c) is the opposite. Option (d) is unrelated.