[音频]Listen to the recording and fill in the missing words. All answers are in lower case.Why do students (01)to the online learning (02)? With over 4 million students (03) in online schools and universities (and that number is (4) 30% per year), there are many strong reasons for (05) a cyber classroom.1. Students can “attend” a (06) at anytime, from (07). This means that parents can attend to their children , then sit down to class; (08) students can attend classes no matter what their work (09) might be.2. Course material is (10) 24 hours a day 7 days a week. Students are able to read and re-read lectures, (11), explanations and comments.3. In an online environment, there are more student (12) and different opinions shared, because everyone gets a say, not just the most (13).4. Online (14)may be from any location across the globe. This allows students to be (15) to knowledge that can’t be learned in books.5. Using the (16) to attend class, research information and (17) with other students teaches skills in using (18) that will be important in the 21st century.