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英语
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( ).____ do you write to your pen pal?Once a month.A.How B .How often C.How much D.How long
人气：225 ℃ 时间：2019-08-18 02:04:46
解答
答案：B
根据答语“一个月一次”,前面应该是询问频率的,用how often.
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