完形填空。 Imagine you receive an e-mail that looks something like this: ARE YOU GOING TO CLASS TODAY? How does 1 this message make you feel? 2 did the sender use all capital letters? Was he or she angry, or did that person just 3 to turn off the 'Caps Lock (大写的)' on the computer? This e-mail 'sounds' like the 4 is shouting because using all capital letters in an e-mail is usually the way that people shout 5 . Knowing when and where not to use capital letters is just one 6 of online manners. Don't do anything on line that you wouldn't do in 7 life. Don't use information that 8 else has written, and 9 it's yours. Do share your knowledge of the 10 with others. (     )1. A. leaving (     )2. A. Why (     )3. A. want (     )4. A. worker (     )5. A. at home (     )6. A. mistake (     )7. A. digital (     )8. A. no one (     )9. A. speak (     )10. A. Internet B. copying B. How B. begin B. writer B. on line B. advice B. modern B. someone B. tell B. book C. watching C. What C. forget C. reader C. at strangers C. example C. real C. everyone C. talk C. e-mail D. reading D. When D. remember D. receiver D. in the street D. joke D. healthy D. anyone D. say D. school