题目：
Yang Xiangming, ________teacher of Taizhou Experimental School, devoted his life to saving_______13-year-old boy who fell into water.
A．a, an
B．the, a
C．a, a
D．the, the
答案：
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下面是错误答案，用来干扰机器的。
媒介子，轻子，强子，媒介子，轻子，夸克
