题目内容：
A. On
B. In
C. At
D. During
参考答案：
答案解析：
单选题：A. OnB. InC. AtD. During
- 题目分类：综合类
- 题目类型：单选题
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A. On
B. In
C. At
D. During
A. On
B. In
C. At
D. During
A. understand B. knowC. recognizeD. observe
A. understand B. knowC. recognizeD. observe
请在（61）处填上最佳答案。
请在（61）处填上最佳答案。A．of B．up C．on D．into
根据材料，回答题：According to the passage, when we become adults.___
根据材料，回答题：According to the passage, when we become adults.__________.A．most of us
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
Industrially contaminated sites usually require a thorough clean up due to _____