问题描述：
we choose a book a_____ the birthday present for our teacher.怎么填
we choose a book a_____ the birthday present for our teacher.
the old man ehjoy w_____ Beijing Opera.
I p_____ to help my mother with the homework怎么填
we choose a book a_____ the birthday present for our teacher.
the old man ehjoy w_____ Beijing Opera.
I p_____ to help my mother with the homework怎么填
问题解答：
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