The students were ___ over the ___ problem,listening to the teacher with a____ expression on their faces.
[     ] 
A. puzzled; puzzling; puzzling
B. puzzled; puzzling; puzzled
C. puzzling; puzzling; puzzled
D. puzzling; puzzled; puzzling
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科目：高中英語 來源： 題型：

On the street I saw a studen _____ I thought was English.

　 A. whom 　 B. who

　 C. the one 　 D. he

 

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