he referred to in his article was unknown to the general reader. A. That B. What C. Whether D. Where [解析] B所填选项引导主语从句.且在从句中充当宾语.所以用what引导. 查看更多

 

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(2007·上海)

________ he referred to in his article was unknown to the general reader.

[  ]

A.That
B.What
C.Whether
D.Where

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