Communication click the sentence on the left, and then click the word or phrase on the right that completes that sentence. sentence a forum temporarily saves messages and often uses a(n) to approve messages before they are posted for others to read. a(n) program, used to participate in a newsgroup, is often provided with some e-mail software. a(n) or internet forum is an online discussion site where people participate in a conversation by posting messages. synchronous communication means that everyone who is communicating must be at the same time. a system that lets people exchange short messages while they’re online is called a(n) system. word or phrase message board online moderator newsreader real-time messaging