Fill in the following blanks according to the audio.[音频]A friend walks in when the rest of the world walks out. A forever friend is someone who changes your life just by being part of it; someone who makes you laugh until ____1_____; someone who makes you believe that there really is good in the world;Someone who ____2_____ you that there really is an unlocked door just waiting for you to ___3______; someone who ____4______ in spirits and makes the dark and empty world suddenly seem bright and full; someone who gets you through the hard times, the sad times, and the ___________.