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题目内容
（河北工业大学大学英语）
The famous explorer _________.
A. had crossed Antarctica and the Atlantic by balloon
B. had traveled all over the world
C. had walked across Death Valley
D. had ever been a millionaire
A. had crossed Antarctica and the Atlantic by balloon
B. had traveled all over the world
C. had walked across Death Valley
D. had ever been a millionaire
参考答案