题目内容：
Some people from the States have decided, just （） curiosity, to make a tour in the space even though it will cost about tens of millions of US dollars.
A.as to
B.out of
C.in that
D.because
参考答案：
选择题：Some people from the States have decided, just （） curiosity,
- 题目分类：中国大学MOOC慕课
- 题目类型：选择题
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