Answer:
All flights were cancelled because of fog.
Step-by-step explanation:
The sentence provided in the question, " They cancelled all the flights because of
." is in the
as the subject
does an action
against object
We have to change this active voice of the sentence into a passive voice sentence.
While changing a sentence from active to passive, the object of the active voice becomes the subject of the passive voice and the verb in the sentence changes to passive form from active form.
Therefore, the passive voice of the sentence would be :
"All flights were cancelled because of fog."