16. John: Isn't Bill a student?
Helen: __ He is a teacher.
(A) Yes, he is.
(B) No, he is.
(C) Yes, he isn't.
(D) No, he isn't.
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統計: A(1), B(0), C(1), D(7), E(0) #3386054
統計: A(1), B(0), C(1), D(7), E(0) #3386054