◎ 题干
Mr Smith ______ to American 10 years ago and has been there ______.
[     ]
A. has gone, since then  
B. went, from then
C. has gone, since then  
D. came, ever since
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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 ______ to American 10 years ago and has been there ______.[ ]A. has gone, since then B. went, from thenC. has gone, since then D. came, ever since…”主要考查了你对  【现在完成时】【介词】  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。