**Rule: Understanding Idiomatic Expressions.** The idiom 'split hairs' means to make overly fine or trivial distinctions; to argue about insignificant details. The phrase 'over such a minor detail' directly explains the meaning. Option (b) is the correct definition. Option (a) is a literal interpretation. Option (c) is the opposite of arguing. Option (d) is what one should do instead of splitting hairs.

**Rule: Understanding Idiomatic Expressions.** The idiom 'caught red-handed' means to be discovered in the very act of committing a crime or doing something wrong. The phrase implies clear and irrefutable evidence. Option (c) is the correct definition. Option (a) and (d) are literal misinterpretations. Option (b) is incorrect; the idiom means being caught *during* the act.

**Rule: Understanding Idiomatic Expressions.** The idiom 'a chip off the old block' refers to a person who is very similar to their parent in personality or appearance. The example of being 'just as stubborn as his father' illustrates this similarity. Option (c) is the correct definition. Option (a) is a literal misinterpretation. Option (b) is the opposite. Option (d) is a possible but separate issue.

**Rule: Understanding Idiomatic Expressions.** The idiom 'throw a spanner in the works' (or 'throw a wrench in the works' in the US) means to do something that suddenly prevents a plan from progressing. New, contradictory evidence can ruin a legal case. Option (b) is the correct definition. Option (a) is the opposite. Option (c) is a literal interpretation. Option (d) is a possible but incorrect interpretation.

**Rule: Understanding Idiomatic Expressions.** The idiom 'dodge a bullet' means to have a narrow escape from a dangerous or undesirable situation. Avoiding a bad investment that leads to bankruptcy is a perfect example of avoiding a financial disaster. Option (b) is the correct definition. Option (a) is the literal meaning. Option (c) is the opposite. Option (d) is an unrelated profession.

**Rule: Understanding Idiomatic Expressions.** The idiom 'with bells on' is used to say that one will be very happy and enthusiastic to go somewhere. It emphasizes eagerness. The phrase 'I wouldn't miss your party for the world!' reinforces this enthusiastic acceptance. Option (d) is the correct definition. Option (a) is a literal misinterpretation. Options (b) and (c) are the opposite of an enthusiastic 'yes'.

**Rule: Understanding Idiomatic Expressions.** The idiom 'move heaven and earth' means to do everything one possibly can to achieve a goal. It implies a huge amount of effort and determination. Option (c) is the correct definition. Option (a) is a literal misinterpretation. Option (b) is the opposite. Option (d) is a possible part of the effort, but not the whole meaning of the idiom.

**Rule: Understanding Idiomatic Expressions.** The idiom 'a pack of lies' is a strong way of saying that a statement or story is entirely false. The phrase 'from start to finish' reinforces the completeness of the falsehood. Option (c) is the correct definition. Option (a) is the opposite. Option (b) is a literal interpretation. Option (d) describes complexity, not truthfulness.

**Rule: Understanding Idiomatic Expressions.** The idiom 'second to none' is a way of saying that someone or something is the very best. If you are second to no one, you are first. Option (c) is the correct definition. Options (a) and (d) are misinterpretations of the word 'second'. Option (b) is the opposite.

**Rule: Understanding Idiomatic Expressions.** The idiom 'too many chiefs and not enough Indians' describes a situation where there are too many people giving orders and not enough people to carry them out. This leads to inefficiency, as suggested by 'nothing gets done'. Option (b) is the correct explanation. Options (a) and (d) are incorrect interpretations of the words 'chiefs' and 'Indians'. Option (c) is the opposite.