— It's reported that the new underground line has been completed. — Yes, but it hasn't bee

题目简介

— It's reported that the new underground line has been completed. — Yes, but it hasn't bee

题目详情

— It's reported that the new underground line has been completed.
— Yes, but it hasn't been made clear _____ it's to be opened to traffic.
[     ]
A. that
B. who
C. what
D. when
题型:单选题难度:偏易来源:北京期中题

答案

D

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