Active: He has called the police.
A. Passive: The police hasn’t been called.
B. Passive: The police has been called.
C. Passive: The police has being called.

Random Topics:
First and Second ConditionalPast or Present Verb TenseAdverbial ClausesPunctuating ClausesPresent PerfectApostrophe GrammarCompound SentencesOrdering AdjectivesConditional TypesArticle the or zero article (-)Other quiz:
Grammar › ViewWhat does must express?
A. A good idea
B. A strong obligation (that comes from the speaker)
C. A suggestion
Tenses › View
Fill in the blank with the correct form: ‘They (not/play) football yesterday.’
A. They do not play football yesterday.
B. They did not play football yesterday.
C. They were not playing football yesterday.
D. They did not played football yesterday.
Verb Tense › ViewIs the verb tense past perfect, present perfect or future perfect? ‘The physicist has calculated the trajectory of the particle.’
A. Past perfect
B. Present perfect
C. Future perfect
D. Simple past
Grammar › View
What is _____ doing in the kitchen?
A. she
B. they
C. we