Not until the 1980’s _____ in Beijing start to find ways to preserve historic buildings from destruction.

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问题 Not until the 1980’s _____ in Beijing start to find ways to preserve historic buildings from destruction.

选项 A、some concerned citizens
B、some concerning citizens
C、did some concerning citizens
D、did some concerned citizens

答案D

解析 考查倒装句。表示时间的not until位于句首时,句子要用倒装形式。concerning为介词,意为“关于”,concerned是形容词,意为“关心公众事务的”,故选D。
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