The glass and bricks ___(start)to fall down by the time they realized it was an earthquake.
题目
The glass and bricks ___(start)to fall down by the time they realized it was an earthquake.
答案
had started [过去完成时]
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我想写一篇关于奥巴马的演讲的文章,写哪一篇好呢?为什么好
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