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7.We know         world would be a very different place without Thomas Edison.(  )
A.anB.theC.aD./

分析 我们知道如果没有托马斯.爱迪生,这个世界将会是一个非常不同的地方.

解答 答案:B.世界上独一无二的事物前必须加定冠词the,world世界,独一无二,故前面用the,故选B

点评 本题考查冠词用法,在独一无二的事物前面用the

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