听力原文：（A) The boxes are on a conveyor belt.（B) Workers are taping the boxes.（C) Workers

听力原文：（A) The bicycles are on sale.（B) The bicycles are parked side by side.（C) The bic

听力原文：（A) The posters on the side of the building are being put up.（B) Some people are

听力原文：（A) The bags are being unloaded.（B) The bags are hanging on a rack.（C) The bags a

听力原文：（A) There is a stack of chairs on the floor.（B) The curtains are drawn.（C) All of

听力原文：（A) They are raising the pipes.（B) They are lying down on the ground.（C) They are

听力原文：（A)The papers are stacked up on the rack.（B)The man is picking up one postcard.（C