Definition: In this task, you're given an article and an answer. Your task is to generate the fill-in-the-blank question for this answer based on the given article. The blanks are always at the end of the question, and can be filled with more than one word or phrase.
Input: Article: How to apply for a free mailbox ? First you have to connect to the Internet and go to the homepage of the ICP providing free mailboxes. Then you will find an icon , an agreement about the rules for using the free mailbox will appear. If you want to go, click the icon "I agree". Then you have to fill in a form about your basic personal data, and the name and PIN of the mailbox. The PIN is the key to the mailbox. After finishing these, you will get a mailbox like this:your name @ mail server (for example:tvguide@mail.cctv.com.cn. "tvguide" is the name of the mailbox, and "mail.cctv.com.cn" is the name of the mail server.). The mailbox is separated into two parts by a separator "@", which is read as "at". The former part is the name of the mailbox. The latter is the domain name of the mail server. All mails to you will be received by the server and put into your mailbox. You can read these mails on any computer on the Internet in the world, if you have the name and PIN of the mailbox.
Answer: apply for a mailbox
Output:
If you want to send or receive an e-mail, you should first _ .