Benjamin Franklin flew a kite in 1752 in order to ______. The original kites were used ______.

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问题 Benjamin Franklin flew a kite in 1752 in order to ______.
The original kites were used ______.

选项 A、as a way to have a fun
B、as a signal
C、in religious ceremonies
D、as tools for study weather

答案B

解析 由文章第二段the Chinese army used them as signals可知风筝是被中国军队用作信号。
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