问题
选择题
A number of high buildings have arisen ________ there was nothing a year ago but ruins.(2012·山东)
A．when
B．where
C．before
D．until
答案
答案：B
句意：很多高楼在一年前还是废墟的地方拔地而起。where引导地点状语从句；而when，before和until都引导时间状语从句。
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