句型转换。
1. I had a nice trip.（改为一般疑问句）
                                                                                        
2. He played cards yesterday.（改为一般疑问句）
                                                                                      
3. Were you happy last weekend7（作肯定回答） 
                                                                                      
4. Can Danny fly a kite?（作否定回答）
                                                                                      
5. It isn't easy.（改为同义句）
                                                                                      
1. Did you have a nice trip?     2. Did he play cards yesterday?     3. Yes, I was.   
4. No,he can't.                       5. It is hard.
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