【题目】It is reported that two schools, ________ are being built in my hometown, will open next year.
A. they both B. which both
C. both of them D. both of which
在线课程【答案】D
【解析】
试题分析：句意：据说我家乡正在被建的两所学校明年开学。句中包含了非限制性定语从句，先行词是schools用which引导，短语both of放在引导词前面，故选D.