题目内容：
Greenspan is aware of these problems, but he doesn't seem to believe there was any way he could have done__________about them.A. anything
B. something
C. nothing
D. everything
参考答案：
答案解析：
单选题：Greenspan is aware of these problems, but he doesn't seem to
- 题目分类：英语
- 题目类型：单选题
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A. anything
B. something
C. nothing
D. everything