Choose the correct modal verb to complete the sentence: ‘He ____ not ask for a raise, for fear of losing his job.’

Modal verbs express necessity, possibility, permission, or ability. The sentence implies a lack of courage or boldness due to a specific fear.

• Dare: This modal verb is used to express courage or the lack thereof, often in negative constructions like "dare not" or "don't dare." It perfectly fits the context of someone being afraid to do something. "He dare not ask for a raise" means he lacks the courage to do so.
• Should: Implies obligation or recommendation ("He should not ask" means it's not advisable).
• Would: Expresses a hypothetical situation or a past habit ("He would not ask" implies he refused or it wasn't his nature).
• Could: Indicates possibility or ability ("He could not ask" means he was unable to).

Given the phrase "for fear of losing his job," Dare is the most appropriate modal verb, conveying the idea of lacking the courage to act.