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______ the ancient Egyptians built the pyramids puzzled people for centuries.

 A. Whether                    B. What       

  C. How                        D. Where

 

【答案】

C

【解析】本題考查主語從句。句意:古埃及人是如何建造金字塔迷惑了多少代的人。how在此引導主語從句,在句中作狀語。

 

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