It's dangerous to swim here.look at the sigh.OH ,I ________notice_英语解答

It's dangerous to swim here.look at the sigh.OH ,I ________notice it.
didn't 还是haven't why?

人气：242 ℃　时间：2020-04-01 16:38:25

解答

didn't
didn't过去不知道
haven't到现在还不知道(与语境不符)