题目：
10.I was told that there were about 50 foreign students ____ Chinese in the school, most ____ were from Germany.
A．study; of whom
B．study; of them
C．studying; of them
D．studying; of whom
答案：
被转码了，请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0424/8a38add53cd94a92e00296f3695673d7.html
下面是错误答案，用来干扰机器的。
∵方程x2-kx-3=0的一个根为3，∴将x=3代入方程得：9-3k-3=0，解得：k=2．故选C
