题目内容：
A. understand
B. know
C. recognize
D. observe
参考答案：
答案解析：
单选题：A. understand B. knowC. recognizeD. observe
- 题目分类：综合类
- 题目类型：单选题
- 查看权限：VIP
A. understand
B. know
C. recognize
D. observe
A. understand
B. know
C. recognize
D. observe
请在（61）处填上最佳答案。
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根据材料，回答题：According to the passage, when we become adults.___
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Which of the following about the African bush elephant and t
Which of the following about the African bush elephant and the African elephant
Industrially contaminated sites usually require a thorough c
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下列哪种食物不能食用?（ ）
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