C．grateful

　　D．careful

　　18．A.safe

　　B．gone

　　C．short

　　D．tidy

　　19．A.thanks

　　B．invitation

　　C．payment

　　D．appreciation

　　20．A.under

　　B．for

　　C．behind

　　D．around

　　.阅读理解

　　(2016·山西省四校联考)

　　One of the founding fathers of the Internet has predicted the end of traditional television.Vint Cerf，who helped to build the Internet while working as a researcher in America，said that the television was approaching its “iPod moment”．

　　In the same way that people now download their favorite music onto their iPod，he said that viewers would soon be downloading most favorite programs onto their computers.“85% of all videos we watch are prerecorded，so you can set your system to download them all the time，” said Mr Cerf，who is now the vice president of Google，the world’s largest search engine.“You’re still going to need live television for certain things—like news，sporting events and emergencies—but increasingly it is going to be almost like the iPod.”

　　Although television on demand has not yet become a mainstream activity in the UK，the BBC，ITV and Channel 4 have all spent vast sums of money on technology which enables viewers to watch their favorite shows on their computers.

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