Suppose you are at the home of your English teacher, Mr. Savior. Mr. Savior says, "We are so glad to have you with us today.” You reply, （ ）(本题3.5分)

A、 A:“Thank you.”
B、 B:“I’m glad to be here.”
C、 C:“I want to see you long ago.”
D、 D:“I’ve bothered you too much.”