Give the correct form of the verb in blankets. 

1. Your dog ever (bite) ......................... anyone?                                              

 - Yes, he (bite) ........................ a policeman last week.                                    

2. Would you mind if  I (take) .............................. a photo of you? .                    

3. It is not difficult (remember) ............................... 3R.                                        

4. Millions of old car tires (throw) .............................. away every year.