听力原文：（A)The signs are showing the speed limit.（B)The road is partially shaded.（C)The r

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

听力原文：（A) There is a sign placed in front of the store.（B) The sign is being written.（C

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

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) They are raising the pipes.（B) They are lying down on the ground.（C) They are

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