◎ 题干
— Mr. Smith joined in different activities in Beijing. Do you know ___________?
— Since 5 years ago.
A.when he went thereB.how long he has stayed there
C.how soon he will come backD.when he will come here
◎ 答案
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◎ 解析
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◎ 知识点
    根据n多题专家分析,试题“— Mr. Smith joined in different activities in Beijing. Do you know ___________?— Since 5 years ago.A.when he went thereB.how long he has stayed thereC.how so…”主要考查了你对  【宾语从句】【状语从句】  等知识点的理解和应用能力。关于这些知识点的“档案”,你可以点击相应的链接进行查看和学习。