听力原文:(A) The boxes are on a conveyor belt.(B) Workers are taping the boxes.(C) Workers
听力,原文
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听力原文:(A) The boxes are on a conveyor belt.
(B) Workers are taping the boxes.
(C) Workers are moving goods.
(D) The boxes are stacked in the corner of the room.

A.
B.
C.
D.
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