**Rule: Understanding Idiomatic Expressions.** The idiom 'music to my ears' refers to information that is very welcome and pleasing to hear. A positive speech after a lot of 'criticism' would be very pleasing. Option (b) is the correct definition. Option (a) is a literal misinterpretation. Options (c) and (d) are the opposite of a pleasant experience.

**Rule: Understanding Idiomatic Expressions.** The idiom 'have a field day' means to have a very enjoyable and exciting time, often by taking advantage of an opportunity to do something you like. Children 'playing in the park' would certainly consider it an enjoyable day. Option (b) is the correct definition. Option (a) and (d) are literal misinterpretations. Option (c) is the opposite.

**Rule: Understanding Idiomatic Expressions.** The idiom 'on the line' means to be in a situation of risk or jeopardy. A career can be 'on the line' if a scandal threatens to end it. Option (b) is the correct definition. Option (a) is a literal misinterpretation. Option (c) is the opposite. Option (d) is an unrelated outcome.

**Rule: Understanding Idiomatic Expressions.** The idiom 'a doubting Thomas' refers to a skeptical person who needs proof to believe something. The name comes from the Apostle Thomas, who doubted Jesus's resurrection until he could see and touch the wounds. The need to 'see proof' is the key characteristic. Option (b) is the correct definition. Option (a) is a misinterpretation. Option (c) is the opposite. Option (d) is a misattribution (he is a biblical figure).

**Rule: Understanding Idiomatic Expressions.** The proverb 'actions speak louder than words' means that people's actions are a better indicator of their character and intentions than their words are. The sentence illustrates this by contrasting 'promising to help' (words) with 'just do it' (action). Option (b) is the correct explanation. Option (a) is a literal misinterpretation. Option (d) is the opposite of the proverb's meaning.

**Rule: Understanding Idiomatic Expressions.** The idiom 'work one's fingers to the bone' is a hyperbole that means to work very hard and for a long time. Providing for a family is a common motivation for such hard work. Option (b) is the correct definition. Option (a) is a literal misinterpretation. Option (c) is the opposite. Option (d) is an unrelated profession.

**Rule: Understanding Idiomatic Expressions.** The idiom 'a wolf in sheep's clothing' refers to someone who appears to be friendly and harmless but is actually hostile and malicious. The sentence itself explains the meaning by contrasting 'pretending to be a friend' with 'secretly working against you'. Option (b) is the correct definition. Option (a) is a literal interpretation. Option (c) is the opposite. Option (d) is an unrelated profession.

**Rule: Understanding Idiomatic Expressions.** The idiom 'turn over a new leaf' means to reform and begin a new and better course of life. Being released from prison is often a catalyst for such a change. Option (c) is the correct definition. Option (a) and (d) are literal misinterpretations. Option (b) is the opposite.

**Rule: Understanding Idiomatic Expressions.** The idiom 'set in stone' means to be fixed and impossible to change. The sentence uses the negative form ('not set in stone') to mean the opposite: that the rules *are* changeable. Therefore, the idiom itself means unchangeable. Option (c) is the correct definition of the idiom. Option (b) defines the situation in the sentence. Option (a) is a literal interpretation. Option (d) is a possible but separate quality.

**Rule: Understanding Idiomatic Expressions.** The idiom 'paint the town red' means to go out and celebrate in a wild and exuberant manner. Celebrating a 'reunion' is a perfect occasion for such a lively celebration. Option (a) is the correct definition. Option (b) is a literal misinterpretation. Option (c) is the opposite. Option (d) is a different kind of activity.