研制出可以携带的盒式磁带，同时还有电台的录像机。

　　6．But __________________ to choose good programmes.

　　但选择好的节目由你自己决定。

　　【答案】　1.developed by　2.it was not until；that　3.It took more than two decades；to begin　4.with everyone receiving　5.so small that　6.it's up to you

　　　阅读P2～P3课文，并从四个选项中选择最佳答案

　　1．Regular public broadcasting first began________.

　　A．on 11 May 1928 in Washington and on 29 August 1929 in New York

　　B．on 11 May 1928 in Washington and on 29 August 1929 in London

　　C．on 11 May 1928 in London and on 20 August 1929 in New York

　　D．on 11 May 1928 in New York and on 20 August 1929 in London

　　2．More colour TVs than black­and­white TVs were being used in________.

　　A．1928 B．1972

　　C．1938 D．1967

　　3．Who invented a record player that used discs as alternatives to tubes?

　　A．John Logie Baird.

　　B．Thomas Edison.

　　C．Emile Berliner.

　　D．Philo Farnsworth.

　　4．What is the main idea of the passage?

　　A．How to use TV, video and sound devices.

　　B．The evolution of video and sound devices.

　　C．The history of sound devices.

　　D．The history of TV.

　　5．What are CDs often used for?

　　A．Copying sound.

　　B．Communication.

C．Storing and playing music.