Researchers have spent five years collecting data _____ the study was based.
A、 on that
B、 in which
C、 in that
D、 on which
【正确答案】:D
【题目解析】:be based on sth. 基于……。介词 + which 引导从句。
Researchers have spent five years collecting data _____ the stud
📱 扫码体验刷题小程序
扫一扫使用我们的微信小程序