1.light bulb is a great______(invent) 2.i think the radio is

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1.light bulb is a great______(invent) 2.i think the radio is_______(useful) than the clock

很高兴为您解答!
1.填invention"发明” ,因为 a great“一个很大的”修饰名词,所以用名词形式
2.more useful 翻译：我认为广播是比时钟更为有用.本题考查多音节形容词的比较级,多音节形容词的比较级在前面加more
希望可以帮到您,

1.light bulb is a great______(invent) 2.i think the radio is I think the most helpful invention is light bulb. It & The light bulb ( ) in the dark.A.IS used as seeing B.is used It took Edison a long time to invent the first light bulb（保持 edison is the inventor of the light bulb Edison is famous (because he invented the light bulb.)对括号部分提 which is light,the Tv or the radio? That the 2008 Olympic Games held in Beijing is a great______ All the great______ are respected by the world.(invent) The person who___(invent)the compass is a great ___(invent). I think there is something wrong with the radio.(攺为同义句） The suitcase is ____ light.I think I can carry it.