Explanation

Correct Passive Voice Conversion:

The original sentence ("Have you finished your job?") is in the active voice (Present Perfect Tense).

Its passive form follows the structure: "Has/Have + subject + been + past participle + by + agent?"

Thus, it becomes: "Has your job been finished by you?"

Explanation

Sunlight provides the energy that plants use during photosynthesis to produce food.

It is the primary source of energy in almost all ecosystems.

Explanation

"The Man of Life Upright" is a poem written by Thomas Campion, a Renaissance poet and composer.

The poem praises a morally upright man who lives in peace, unaffected by worldly troubles.

Explanation

The subject "A lot of houses" is plural, so it takes "have" as the auxiliary verb.

Correct sentence: "A lot of houses have collapsed due to the earthquake."

Explanation

Sound travels as a longitudinal wave, where particles vibrate parallel to the direction of wave motion.

In contrast, light is a transverse wave, with vibrations perpendicular to the direction of propagation.

Explanation

Nobody has touched this box.

Passive voice: This box has never been touched by anybody.

"Nobody" becomes "by anybody" in passive.

Present perfect tense is maintained: has been touched.

Explanation

This is a passive voice transformation of a sentence with causative structure.

Subject "They" becomes agent in passive form: "We were expected by them to build the road."

Explanation

سچل سرمست کو 7 زبانوں پر عبور حاصل تھا، جن میں سندھی، سرائیکی، پنجابی، فارسی، اردو، عربی، اور بلتی شامل ہیں۔

وہ "شاعرِ ہفت زبان" کہلاتے ہیں یعنی سات زبانوں کے شاعر۔

Explanation

Why has the mirror been broken by you?

This is a present perfect interrogative sentence in passive voice.

Structure: Why + has/have + object + been + past participle + by subject.

Explanation

Step 1: Understand the problem

The problem asks for the product of √-2 × √-2.

Step 2: Calculate the product

√-2 × √-2 = (√-1 × √2) × (√-1 × √2)

= (√-1)² × (√2)²

= i² × 2

= -1 × 2

= -2