英语听力短文18 Knock, Knock, Knock!

Linda's apartment intercom buzzed. She picked up the intercom phone. "Hello," she said. "The UPX man is coming up," said Julia. Julia worked at the front desk. Finally! Linda had been waiting two weeks to return a package. She took the package to the front door. She waited for the doorbell to ring. She thought she heard someone. She opened the door. No one was there. She shut the door. She stood just inside the door. A few minutes went by. She stared at the package. Where was this guy? Did he get lost? Did the elevator get stuck? Did he go to the wrong floor? Maybe she should call Julia back. KNOCK! KNOCK! KNOCK! Linda almost jumped out of her skin. Was he trying to break the door down? She couldn't believe the door was still on its hinges. "UPX!" the man yelled at the top of his lungs.