词汇部分。
根据句意及首字母提示，在空白处填入适当的单词。－How often does Jim go to the library?
－He goes to the library o________ a week．
答案：once
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词汇部分。
根据句意及首字母提示，在空白处填入适当的单词。－How often does Jim go to the library?
－He goes to the library o________ a week．
