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

听力原文：（A) The gardeners are planting a tree. （B) The firefighters are filling their buc

听力原文：（A) Some boats are docked in the harbor.（B) The boats are transporting cargo.（C)

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：W: Did you throw away the extra paper？M: No, I gave half of it to a friend and ke

听力原文：（A) The classroom is nearly empty.（B) The man is handing out some papers.（C) The

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