含有be动词的肯定句变一般疑问句练习
(含有be动词的)肯定句变一般疑问句练习将下列句子改为疑问句,并作肯定回答和否定回答。He is a policeman.They are shop assistant.The piano is ve
含有be动词的肯定句变一般疑问句练习