题目内容
3．---________do you write to your parents？---Once a month．（ ）
| A． | How long | B． | How soon | C． | How often | D． | How far |
分析 -你多长时间给你的父母写一次信？
-一月一次．
解答 答案：C；
How soon多久以后，再过多久，主要用来对表示将来的一段时间的提问；How often多久一次（对频率进行提问）； How long 多长时间（对时间多久进行提问）；How far 多远（对距离进行提问）；根据答语Once a month一月一次，可知上句是询问频率的；故选C．
点评 首先根据语境，细读选项，然后通过题干中的已供信息，捕捉到解题线索．
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