YOU SAID:
WHAT HAVE YOU DONE? YOU DID THIS!
INTO JAPANESE
あなたは何をしましたか?あなたがこれをやったのです!
BACK INTO ENGLISH
what did you do? You did this!
INTO JAPANESE
あなたは何をしましたか?これはあなたがやったのです!
BACK INTO ENGLISH
what did you do? You did this!
That didn't even make that much sense in English.