Question

The room looks tidy. It _________ just now.​

Answer 1

Correct option is

A

Has been cleaned

Here, 'has been cleaned' in present perfect tense is correct because it is used to indicate an action which started in the past and has continued up untill now.

'Have been cleaned' is incorrect because the subject (room) is singular and with singular subject, singular verb (has) is correct.

'Are cleaned' is incorrect because the subject (room) is singular.

'Will be cleaned' in future continuous is incorrect because it indicates what will be going on in the near future.