Select the option that expresses the given sentence in passive voice.
Everyone was surprised at his speech.

Correct option is D

The correct passive voice of the given sentence is (d) His speech was surprising to everyone.
Rules for Active-Passive Voice Conversion:
· Active Voice Structure: Subject + Verb + Object
· Passive Voice Structure: Object + Helping Verb + Past Participle + Subject
· Active Voice: "Everyone was surprised at his speech."
· Subject: Everyone
· Verb: was surprised
· Object: his speech
· Passive Voice: The object "his speech" becomes the subject.
· Since "surprised" is a past participle, it changes to an adjective in the passive form: "was surprising to everyone."
Example:
· Active: The news shocked everyone.
· Passive: The news was shocking to everyone.
Explanation of other options:
· (a) His speech surprise everyone. ❌ (Incorrect tense)
· (b) His speech surprised everyone. ❌ (Still active voice)
· (c) His speech is surprising everyone. ❌ (Incorrect tense)