After driving for thirty miles, she suddenly realized that she ()in the wrong direction. (A) was driving (B) has been driving (C) had been driving (D) drove
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17.下列具块茎,唇形瓣,微小种子的一组是( )A 知母、天南星 B 黄精、麦冬 C 半夏、石斛 D
17.下列具块茎,唇形瓣,微小种子的一组是( )A 知母、天南星 B 黄精、麦冬 C 半夏、石斛 D 石斛、白芨