A.I. Explanation:

Correct answer: dominant

Explanation: The word 'dominant' fits grammatically as an adjective describing the noun 'layout.' It indicates that the QWERTY keyboard layout is the most prevalent or influential among keyboard designs, which aligns with the context of discussing its historical significance.

Meaning: 'Dominant' means having power and influence over others, in this case, referring to the QWERTY layout's prevalence.

Wrong options:

• over: 'Over' is a preposition that does not function as an adjective and does not describe the keyboard layout.
• through: 'Through' is a preposition that indicates movement within something, which does not apply to describing a keyboard layout.
• intruding: 'Intruding' is a present participle that implies unwelcome entry, which does not fit the context of describing a keyboard's status.
• recommending: 'Recommending' is a present participle that suggests giving advice, which does not describe the keyboard layout's dominance.

Correct answer: over

Explanation: The word 'over' is a preposition that indicates starting again from the beginning, which fits the context of having to redo the entire page after an error.

Meaning: 'Over' in this context means to start again from the beginning after making a mistake.

Wrong options:

• through: 'Through' is a preposition that indicates movement from one side to another, which does not convey the idea of starting again.
• intruding: 'Intruding' is a present participle that does not relate to the action of starting again and implies unwelcome entry.
• dominant: 'Dominant' is an adjective that does not fit as it does not convey the action of starting over.
• recommending: 'Recommending' is a present participle that suggests giving advice, which does not fit the context of starting again.

Correct answer: alleviating

Explanation: The word 'alleviating' is a present participle that describes the action of making a problem less severe, which fits the context of how the QWERTY keyboard helps reduce typing errors.

Meaning: 'Alleviating' means to make something less severe or serious, in this case, reducing the burden of errors while typing.

Wrong options:

• over: 'Over' is a preposition that does not convey the action of reducing or easing a problem.
• through: 'Through' is a preposition that indicates movement and does not relate to the action of reducing errors.
• intruding: 'Intruding' is a present participle that implies unwelcome entry, which does not fit the context of reducing typing issues.
• recommending: 'Recommending' is a present participle that suggests giving advice, which does not describe the action of easing a problem.