单选题 8.   It is reported that two schools, both of them are being built in my hometown, will open next year.
【正确答案】 B
【答案解析】 应改为both of which。本题考查定语从句。分析句子结构可知，逗号中间是个非限制性定语从句，所以应用“介词+which”引导从句。
   据报道，在我家乡正在修建的两所学校将于明年开放。