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-Do you know who invented telephone? -No. But it is really most useful invention

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-Do you know who invented telephone? -No. But it is really most useful invention

－Do you know who invented ________ telephone?

－No. But it is really ________ most useful invention.

[]

A．the; theB．a; aC．a; theD．the; a

试题答案

答案：D

提示：

发明物前一定要用定冠词，a most useful invention：一项很重要的发明。因此答案为D。

标签：telephoneinventedbutnoyou

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