19. ( ) John: Excuse me. I’d like to mail a letter. Do you have a(n) ________ ? I want to put my let
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19. ( ) John: Excuse me. I’d like to mail a letter. Do you have a(n) ________ ? I want to put my letter in it.Mary: Yes, here you are. (A) stamp (B) envelope (C) pipe (D) glove