题目内容：
4. Why is the bridge open in the middle?回答A. To make it special.
B. To attract (吸引) more people from the world to see it.
C. To let the big ship through to the Pool of London.
参考答案：
选择题：4. Why is the bridge open in the middle?回答
- 题目分类：国家开放大学理工英语1
- 题目类型：选择题
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A. To make it special.
B. To attract (吸引) more people from the world to see it.
C. To let the big ship through to the Pool of London.