12. A: Where are you going? B: To the post office. I have to mail a ________. (複選)
(A) stamp
(B)letter
(C) postcard
(D) junk mail
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統計: A(190), B(1862), C(1801), D(152), E(6) #1967522
統計: A(190), B(1862), C(1801), D(152), E(6) #1967522