who's the second student（）a talk in class A、gives B、to give C、giving D、give为什么选择b 呢
问题描述：
who's the second student（）a talk in class A、gives B、to give C、giving D、give为什么选择b 呢
答
B
这是个固定结构【the + 序数词+ 不定式】
再如：
He was the first person to reach the top of the mountain