Choose the correct passive form."Houses ............ built."Awas beenBis beenChave beenDhas beenAnswer: C. have been Read Explanation: തന്നിരിക്കുന്ന വാചകം passive form of present perfect രൂപത്തിലാണ്. അതിനാൽ passive voice =object+have/has+been+v3+by+rest of the sentence. Read more in App