句型转换（每题2分，满分10分)
1. Climb the tree. (改为否定句)
                                              
2. Are these orange oranges? (改为单数句)
                                               
3. The girl is a teacher.  (对划线部分提问)
                                               
4. We read English for half an hour every day.（对画线部分提问）
                                                      
5. His mother wants to buy some nice food..（对画线部分提问）