(2013·江西南昌一模)It hasn't been made clear the new underground line is to be open to traffic.

发布时间：2020-08-17 09:33:00

(2013·江西南昌一模)It hasn't been made clear      the new underground line is to be open to traffic.
A. when
B. that
C. what
D. where

网友回答

(答案→)A. when
B. that
C. what
D. where
解析：选A　考查名词性从句。句意：新的地铁线路何时开放还不清楚。句中it是形式主语，空处引导的是主语从句。根据句意可知选when。
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