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A federal advisory panel proposes expanding a national computerized file to permit law-enforcement agencies to track people under criminal investigation but have not yet been charged.
(A) under criminal investigation but
(B) under criminal investigation, but who
(C) under criminal investigation, but they
(D) who are under criminal investigation, but they
(E) who are under criminal investigation but
选项A为何错误?从句中的Who are不是可以省略吗? |
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