30． Radio is used a lot because__________ _．

A．it costs less than TV

B．it costs more than TV

C．it is not so cheap as TV

D． people can't know the news on TV

[单选题]B．ecause of its intimacy, radio is usually more than just a medium; it is _______ .A． firm B company C corporation D enterprise

[单选题]______no need ______ the radio as I’ve used to studying with it on.A.It’s;

[单选题]I have to see the doctor because I a lot lately. ( )A． have been coughingB． had coughedC． coughedD． cough

[问答题]A lot of natural resources in the mountain area are to beexploited and used

[问答题]A lot of natural resources in the mountain area will be exploited and used.

[问答题]A lot of natural resources in the mountain area will be exploited and used.

[单选题]( ) are bound morphemes because they can not be used as separate words.A.Ro

[单选题]( ) are bound morphemes because they can not be used as separate words.A.Ro

[单选题]30．A．playB．playingC．playsD．plaies

[单选题]30．A．mountainsB．citiesC．riversD．seas