把下面句子變成變動(dòng)語(yǔ)態(tài)。
1. We use the computer to search for information.
    The computer _____ _____ to search for information.
2. We used the computer for playing games.
    The computer _____ _____ for playing games.
3. Jackson designs this CD-ROM.
    This CD-ROM _____ _____ by Jackson.
4. We call it printer.
    It _____ _____ printer.
5. They learn English on the radio.
    English _____ _____ on the radio.
1. is used   2. was used  3. is designed  4. is called  5. is learned

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