Direction: Each of the following sentences in this section has a blank space with four-word or a group of words given. Select whichever word or group of words you consider the most appropriate for the blank space and indicate your response on the answer sheet accordingly. The difficult thing about (1)_________the science of habits is that most people when they hear about this field of research (2)______ to know the secret formula for quickly changing any habit. If scientists have discovered how (3)______ patterns work, then it stands to reason that they (4)________ have also found a recipe for rapid change, right? if only it (5)_________ that easy. It's not (6)________ formulas don't exist. The problem is that there isn't one formula for (7)_________ habits. There are thousands. Individuals and habits are (8)_________ different and so the specifics of diagnosing and changing the patterns in our lives differ from person to (9)________ and behaviour to behaviour. Giving up cigarettes is different (10)________ curbing overeating, which is different from changing how you communicate with your spouse, (11)_______ is different from how you prioritize tasks at work. What's more, each person's habits are (12)______ by different cravings. As a result, this book does not (13)________ one prescription, Rather, I hoped to deliver something else: a framework for understanding (14)_________ habits work and a guide to experimenting with how they (15)________ change. Some habits yield easily to analysis and influence. Others are (16)______ complex and obstinate and require prolonged study. And for others, change is a (17)_______ that never fully concludes. But that does not (18)_______ it can't occur. Each chapter in this book explains a different aspect of why habits exist and how they function. The framework (19)___________ in this section is an attempt to distill, in (20)_________ very basic way, the tactics that researchers have found for diagnosing and shaping habits within our own lives.
What would come in place of 4
must
Understanding Sentence Structure and Context
The question asks us to choose the most appropriate word to fill in blank (4) in the given paragraph. The sentence containing the blank is: "If scientists have discovered how (3)______ patterns work, then it stands to reason that they (4)________ have also found a recipe for rapid change, right?"
Let's break down this sentence:
- The first part, "If scientists have discovered how (3)______ patterns work," is a conditional clause setting up a premise. It talks about something scientists have already done (discovered how patterns work).
- The second part, "then it stands to reason that they (4)________ have also found a recipe for rapid change, right?", presents a logical conclusion or deduction drawn from the premise. The phrase "it stands to reason that..." means that something is logical or obvious given the circumstances.
- The blank (4) is followed by "have also found". This structure (modal verb + have + past participle) is typically used to express a conclusion or deduction about something that happened in the past or a conclusion drawn in the present about something related to the past/present state.
Analyzing the Options for Blank (4)
We need a word for blank (4) that fits grammatically and logically with the phrase "it stands to reason that they... have also found...". Let's examine the given options:
- must: "must have found" is used to express a strong logical deduction or conclusion. If it is logical that something is true (as indicated by "it stands to reason"), then "must" fits well to convey this strong conclusion.
- will: "will have found" is used for the future perfect tense, indicating an action that will be completed at some point in the future. This does not fit the context, which is drawing a conclusion *now* based on present/past knowledge (scientists *have* discovered).
- would: "would have found" is often used in hypothetical or conditional sentences (e.g., "If they had searched, they would have found it"). While it can sometimes suggest a logical consequence, "must have" is a stronger and more direct way to express a logical deduction introduced by "it stands to reason".
- might: "might have found" is used to express possibility or uncertainty about something in the past or a present conclusion. The phrase "it stands to reason that..." suggests a high degree of logical certainty, making "might" (which implies uncertainty) less suitable than a word indicating a stronger deduction.
Determining the Best Fit
The sentence structure "it stands to reason that they... have also found..." requires a word that conveys a logical deduction or conclusion. Among the options, "must" is the modal verb most commonly used to express a strong logical deduction. If scientists have figured out how patterns work, it is logical to conclude that they must have also found a way to change them quickly (or a "recipe" for rapid change), at least in theory. The word "must" perfectly captures this sense of logical necessity or strong probability based on the preceding information.
Therefore, the word that best fits in blank (4) is "must".
Final Answer Selection
Based on the analysis, the word "must" is the most appropriate choice for blank (4).
| Option | Word | Analysis | Fit? |
|---|---|---|---|
| 1 | must | Expresses strong logical deduction. Fits "it stands to reason that...". | Yes |
| 2 | will | Future perfect; does not fit the context of present deduction. | No |
| 3 | would | Often hypothetical; less direct for logical deduction than 'must'. | Less likely |
| 4 | might | Expresses possibility/uncertainty; contradicts the sense of logical certainty implied by "it stands to reason". | No |
Revision Table: Grammar Concepts
| Grammar Concept | Explanation | Example in Context |
|---|---|---|
| Modal Verbs | Auxiliary verbs (like must, will, would, might) that modify the main verb to express possibility, necessity, permission, etc. | Used before "have found" in the options. |
| Modal Verbs + have + Past Participle | Used to express deductions, possibilities, or necessities about past events or present conclusions based on past events. | "must have found", "might have found", "would have found". |
| "It stands to reason that..." | An idiom meaning it is logical, obvious, or reasonable to conclude that something is true. | Introduces the clause where the blank is located. |
| Logical Deduction | Reaching a conclusion based on known facts or premises. | The sentence uses "it stands to reason" to introduce a logical deduction about what scientists must have found. |
Additional Information: Modal Verbs for Deduction
Modal verbs are essential for expressing different degrees of certainty or logical conclusions. When making deductions about something that has happened or is currently true based on evidence, we often use specific modal verbs:
- Must: Used for strong deductions when you are almost certain something is true based on the evidence or logic. Example: "She hasn't eaten all day; she must be hungry."
- Can't/Couldn't: Used for strong negative deductions when you are almost certain something is not true or not possible. Example: "He just ate a huge meal; he can't be hungry already."
- May/Might/Could: Used for possibilities or less certain deductions. Example: "The lights are off; they might not be home yet."
In the context of the sentence, "it stands to reason that..." strongly implies a logical conclusion, making "must" the most fitting choice among the options to reflect this strong deduction.
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