His father saw … that Andrew got all the answers wrong

Analyze the question

The sentence is: "His father saw __ that Andrew got all the answers wrong." We need the correct idiom to fill the gap.

Explain the concept

This question tests idiomatic prepositional phrases. The fixed expression "at a glance" means immediately, with just a quick look, without needing to study something closely. Examples:

• "She could tell at a glance that the room had been searched."
• "The teacher saw at a glance that the student had copied."

The other options are not standard English idioms:

• "in a glance": not an accepted idiom (we say "in a moment" or "in a flash")
• "by a glance": not idiomatic
• "with a glance": it can appear in sentences like "He greeted her with a glance," but it doesn't carry the meaning of "immediately" and doesn't fit before a that-clause here

Solution

Substituting the correct idiom: "His father saw at a glance that Andrew got all the answers wrong."

This means the father noticed straight away, with only a quick look at the paper, that all the answers were wrong. It fits both the meaning and the grammar.

Answer: The correct option is D. at a glance.

Tip: In English Language "Lexis and Structure" questions, memorize common fixed phrases like at a glance, at first sight, in a nutshell, on the spot. If a phrase sounds odd when you say it aloud, it is probably not the idiom. Learn the preposition together with the phrase, not separately.