아이고 이 나쁜 아이!
Alright to have no space between 안 and 했어요?
I've seen a lot of natives do it, so I think it is
A space is required. I replaced this exercise with a correct one. We are sorry for the confusion.
I said "The bad child did not say hi" and got it wrong. Reported Sunday 10 Dec 2017.
Its more like "introduce himself".
"the bad child did not greet" is also wrong? does it sound unnatural? (not a native english speaker)
"to greet" is always used with object. E.g.
I greet her- I, subject; "her", object.
The bad child has not say hello should had been accepted.
Typo: has not said