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单选题
At what depth did Mr. Hyatt use the camera?
A
5 feet
B
10 feet
C
15 feet
D
20 feet
参考答案
参考解析
解析：
根据第2段第2句after using the camera in a swimming pool for twenty minutes at only five feet可知Mr. Hyatt在水深5英尺的游泳池中使用了照相机，故A项为正确答案。
根据第2段第2句after using the camera in a swimming pool for twenty minutes at only five feet可知Mr. Hyatt在水深5英尺的游泳池中使用了照相机，故A项为正确答案。
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