SectionD大家打开爱听外语sectionD部分,做passage1到passage5 Passage1 Nowadays, more and more students are using emails to communicate. Several reasons why email has become a great tool are that it is fast, 1——, and affordable. In the past, students often use traditional letters to 2—— ideas. However, the turn around time for sending and receiving traditional letters can take 3—— months. Furthermore, students have to pay high international postage to send the letters. With email, however, messages can be sent at a click of a button at school, home, or an Internet cafe, and if you are using a free email 4——, the cost is free. Instead of waiting days or weeks for a 5——, students can receive a reply quickly.