◎ 题干
The Smiths            all over the country. So they plan            foreign countries.      
[     ]
A. have traveled; visit
B. traveled; to visit
C. traveled; visiting
D. have traveled; to visit
◎ 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“The Smiths all over the country. So they plan foreign countries. [ ]A. have traveled; visit B. traveled; to visit C. traveled; visiting D. have traveled…”主要考查了你对  【不定式】【现在完成时】  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。