M: Is April Fools Day on Friday or Saturday this year? ,F: I'm almost certain it's on Thursday.
(A) M: I didn't know April Fool's Day is on Thursday. (B) M: I didn't know April Fool's Day is on Saturday. I though it was on Thursday. (C) M: April Fool's Day is on Friday? I didn't know that. (D) M: I’m sorry, I don’t understand. Could you say it again?
A