Sending and reading email has quickly become one of the most popular daily activities around the world, 76 ____for business or pleasure. Now, more and more teachers and students are using this form of 77 ____to improve their language skills, particularly English.
The reason 78 ____email has become a great tool is that it is fast, convenient, and 79 ____. One particular activity that takes advantage of these points is a keypal exchange. In the past, teachers often organized pen friends project 80 ____their students would exchange letters with another group of students in another country. ___81 ____, the turn-around time for sending and receiving traditional letters (and then follow-up replies) can take up to a month for the whole process, and by that time, students might 82 ____interest in the project or the class might end before a series of meaningful exchanges can take place. 83 ____, students have to pay international postage to send the letters, something the students might be unwilling to do.
With email, however, messages can be sent at a 84 ____of a button at school, home, or an Internet cafe, and if you are using a free email account, the cost is free (not taking into account any Internet Service Provider fees you have to pay). 85_______ waiting days or weeks for a response, students can receive a reply within days, hours, or even minutes.
83.____
A、 Likely
B、 Besides
C、 In other words
D、 Therefore
【正确答案】：B
