Class is over.Goodbye!( ) .a:That's OK.b:That's right.c:l'm right.d:lt;s fine.

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Classisover.Goodbye!().a:That''sOK.b:That''sright.c:l''mright.d:lt;sfine.Classisover.Goodbye!().a:That''

Class is over.Goodbye!( ) .a:That's OK.b:That's right.c:l'm right.d:lt;s fine.
Class is over.Goodbye!( ) .a:That's OK.b:That's right.c:l'm right.d:lt;s fine.

Class is over.Goodbye!( ) .a:That's OK.b:That's right.c:l'm right.d:lt;s fine.
D.拜拜

选d