听力原文：（A) The worker is going up the stairs. （B) The gas tank in the car is full. （C) T

听力原文：The shopping center is in the tall building. A．B．C．

听力原文：（A) The man is examining something on the wall.（B) The man is posting a message.（

听力原文：（A) The woman is making coffee.（B) The window is being closed.（C) The woman is lo

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 man is doing maintenance outside.（B)The man is writing a letter.（C)The man

听力原文：（A)The man is posing for a picture.（B)The man is taping the scenery.（C)The man is