Mark the letter A, B, C, or D to indicate the most suitable response: Mary (on the phone)Đoạn văn21/40Mark the letter A, B, C, or D on your answer sheet to indicate the most suitable response to complete each of the following exchanges. Mary (on the phone) : “Could I speak to Susan?” - Susan : “ _________!”TalkingCallingAnsweringSpeakingGiải thíchĐáp án D.