怎樣巧妙地與老外告別

用英語巧妙的擺脫老外的“糾纏”很重要：
    I have a meeting soon.
    I have an engagement soon.
    I have an engagement very shortly.
    I have an date very shortly.
    I think I'd better go now.
    I think I should go now.
    I think I ought to go now.
    I think I must go now.
    It's getting dark.
    It's getting dark outside.
    I've to go quite soon.
    I must go quite soon.
    I must leave quite soon.
    I've got to go leave in a few minutes.
    It was fun to get together again.
    It was exciting to get together again.
    It was exciting to talk to each other.