翻译：He has a child.
I thought it was "He has a kid" but is says it's wrong!=( I guess they wants it to be "He has a child" but "Child" and "Kid" are the same thing. It dosen't accept kid.
"Child" and "kid" are the same thing, but "child" is more formal than "kid". They should still accept "kid" though. Please report it. Thank you!
Because children is plural, child is singular, so it can be kid or child in this sentence. Plural: kids or children Singular: kid or child