读句子判断对错。（16分)
（1）You must stop at a red light.                                      
（2）You can sing and dance in a library.                                
（3）If you have a headache, you go to the cinema.                        
（4）You can go to school by plane, it's not very far.                      
（5）"N" means "not".                                                  
（6）You needn't wash your hands before meals.                          
（7）You needn't learn English because you are not an English.