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【题目】—________invented the telephone?

—Sorry,I don't know. Let's ask the teacher.

A. What B. When C. Where D. Who

【答案】D

【解析】

句意:——电话是谁发明的?——对不起,我不知道。我们问问老师吧。A. What什么;B. When何时;C. Where哪儿;D. Who谁。问句缺少主语,只有whatwho可以用作主语,排除B,C;动词invent的执行者应该是人,故答案选D。

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