There can't be many people (32) _________ are unaware of e-mail, even if they have never actually sent one. (33) __________ there are some similarities between e-mail and letters, there are also many differences. The first is that e-mail is delivered instantly, so it can be (34) __________ very effective means of (35) _________  when speed is important. This speed means that e-mail is more practical for communicating over large distances. Another difference is that e-mail tends (36) __________ relatively informal. People are much more (37) __________ to use language which they would consider unsuitable (38) _________ a formal letter. Words spelled incorrectly in an e-mail (39) __________ less likely to be checked than in a letter. One explanation for this is that an e-mail seems to be less permanent than something written on paper. We can be sure that the future (40) __________ of e-mail will have all kinds of unexpected effects (41) _________ the way we communicate.

There can't be many people (32) _________ are unaware of e-mail, even if they have never actually sent one.