Select the most appropriate option that can substitute the underlined segment in the given sentence.
No sooner did we reach at the party that it began to rain.

Correct option is D

Explanation:
The correct construction after “No sooner did...” is “than”, not “that”.
Correct Sentence:
No sooner did we reach at the party than it began to rain.
The expression "No sooner... than..." is used to describe two actions happening in quick succession, where the second follows the first almost immediately.
Common alternatives: Hardly... when, Scarcely... when
Grammar Rule:
· No sooner is always followed by than, not "that" or "when".