15．聽(tīng)第10段材料，回答第18至20題．
18．Which hand did the first clock have？
A．The second hand．
B．The minute hand．
C．The hour hand．
19．Why did bells become a part of clocks？
A．They were for the rich．
B．They were for the blind．
C．They were for students．
20．What is the talk mainly about？
A．A famousclock．
B．How clocks are made．
C．The history of clocks．

分析 略

解答 CBC

點(diǎn)評(píng) 略

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