they came here an hour ago 改为同义句 they ___ ___ here for an ho
they came here an hour ago 改为同义句 they ___ ___ here for an hour
the dog died two weeks ago
改为同义句
the dog ___ ___ ___ since two weeks ___
the dog died two weeks ago
改为同义句
the dog ___ ___ ___ since two weeks ___
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