问题描述：
用适当的介词或副词填空.1.what is the secret （）your good English pronunciation?
2.some students hide（） their books,playing （）their mobile phones
3.you can look （）the telephone numbers （）the yellow book
2.some students hide（） their books,playing （）their mobile phones
3.you can look （）the telephone numbers （）the yellow book
问题解答：
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