完形填空

　　The most frightening words in the English language are,“Our computer is down．”You are hearing it more and more when you are 　　1　　．The other day I was 　　2　　 waiting for a ticket to Washington and the girl in the ticket office said,“　　3　　, I can't sell you a ticket．Our computer is 　　4　　．”

　　“If your computer is down, just 　　5　　 me out a ticket”．

　　“I can't write you out a ticket．The computer is the only one 　　6　　 to do so．”

　　I looked down the counter and every 　　7　　 was just standing there staring at the 　　8　　 screen．Then I asked her,“What do you do?”

　　“We give the computer 　　9　　 about your trip, and then 　　10　　 tells us whether you can fly with us or not．”

　　“So when it goes down, you 　　11　　 with it”．

　　“That's right, sir．”

　　　　12　　 will the computer be down?”I wanted to know．

　　“I have no idea．Sometimes it's down for 10 minutes, sometimes for two hours．There is no way we can 　　13　　 without asking the computer, and 　　14　　 it's down it won't answer us．”

　　　　15　　 the girl told me they had no backup(备用)computer, I said,“Let's forget the computer．What about your 　　16　　?They're still flying, aren't they?”

　　“I couldn't tell without asking 　　17　　．”

　　By that time there were quite a few people standing in lines．　　18　　 soon spread to other travelers that the computer was down．Some people 　　19　　, some people started to cry and still others kicked their 　　20　　．

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