In 2018, when Alan was visiting Rhode Island with his family, he sent (发送) out a message in a bottle (瓶子). The message said, "It's Thanksgiving Day. I'm 13 years old and visiting my cousins in Rhode Island. I'm from Vermont. If you find this bottle, please e-mail me at messageinabottle2018@gmail. com. "
In 2021, 17-year-old Richard from Portugal found the bottle. Richard said, "I often pick up rubbish (垃圾) on the beach (A)____ (help) the environment (环境). One day, I saw a bottle (B)____ a message in it. So I (C)____ (bring) it home. "
(D) Richard sent a message to the e-mail address (地址 . But he didn't hear from anyone. That was because Alan didn't remember the password (密码) to his e-mail. (E) 他也不记得瓶子里的消息。
But the story didn't stop there. One year later, Richard's mother put a picture (F)____ the bottle and message on the Internet. Alan was surprised to see the picture and soon e-mailed Richard. Now, Alan, 17 and Richard, 18 are friends. They think it is really cool to meet each other in this way.
The two boys think meeting each other in this way is.