题目内容
10．____has Mr White been a member of Greener China since he ____ to China？（ ）| A． | How soon，comes | B． | How often，got | C． | How long，came | D． | How far，arrived |
分析 自从怀特先生来到中国他已经成为绿色中国的一员多久了？
解答 答案：C．考查疑问词．句意"怀特先生已经成为绿色中国的一员多久了，自从他来到中国？"．how soon"多快/多久以后"，其后用in加一段时间来回答．how often多久一次，对频率提问．how long多久，对段时间提问，通常用现在完成时态．how far多远，对距离提问．根据has been现在完成时态，及since自从…，可知表示时间段，用how long．第二个空since引导的时间状语从句，主句用现在完成时态，从句用一般过去时态，came to来到．不应该用到达．答案是C．
点评 疑问词通常用来构成疑问句，要根据回答的具体内容进行选择，注意一些固定搭配，分清疑问词的用法．
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