Question

Call
The
doctor
at once
croice change)​

Answer 1

Answer:

Let the doctor be called at once.....

Answer 2

Answer:

Let the doctor be called at once.

Explanation:

Given sentence,

Call the doctor at once.

The given sentence is in active voice since the object is the doer of the action.

So, we need to convert it to passive voice.

Sentence after converting to passive voice,

Let the doctor be called at once.