once a week 一周一次,是表示频率的词
所以对此提问的话,应用表示频率、频次的特殊疑问词 how often
How often does he go to see his uncle?
He goes to see his uncle (once a week）.对括号内提问
He goes to see his uncle (once a week）.对括号内提问
英语人气：973 ℃时间：2019-10-17 05:58:15
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