The floor ________ when I arrived.
has been cleaned
is being cleaned
was being cleaned
Correct Answer: EASY
In the sentence, it is necessary to use the harmony between the two simple past tenses and the past continuous to describe an action that was taking place in the past when another action interrupted.
=> “Someone” was cleaning the floor when I arrived.
=> The floor was being cleaned when I arrived.
=> When I arrived, the floor was being mopped.
The answer to choose is: EASY