1. In fact, questioning is the best way to learn new things. ��ʵ�ϣ����������ѧϰ��������ѵ�;����
2. Dexterity in questioning the witnesses helped the lawyer win many cases. ��������֤�˰����Ǹ���ʦӮ�˺ܶ��˾��
3. But experts are already questioning the ethics and validity of such tests. ����ר���ǿ�ʼ�������ֲ��Եĵ����ԺͺϷ��ԡ�
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n.
1. a request for information
2. perplexed (as if being expected to know something that you do not know)
3. marked by or given to doubt
4. showing curiosity