问题
选择题
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; to visit
答案
答案：D
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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：D