题目内容：
Although it looks something like a volcanic（）, this is actually a picture of a dust storm.
A.phenomenon
B.eruption
C.explosion
D.explode
参考答案：
选择题：Although it looks something like a volcanic（）, this is actua
- 题目分类：中国大学MOOC慕课
- 题目类型：选择题
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