根据下列各句句意及所给单词的首字母或汉语意思，在句首写出该单词的正确形式。

1. I’ve always been very ______ (谨慎的) about giving my address to strangers.                                 

2. Fold the letter and put it in an ______ (信封).                                                             

3. Any creature who ______ (拥有) one of these rings has great  power.                                     

4. He considered that the change could be ______ (有益的) to her health.                                    

5. I was ______ (享有) with a happy childhood, one that most people  would want to have.                        

6. The man was one of the s______ from the earthquake.                                                          

7. Whenever you are in trouble, don’t h______ to ask me for help.                                              

8. The situation at Omaha Beach was so bad that the US army commanders thought about a_____

    the invasion.     

9. Please don’t i______ me when I am talking.                                                                 

10. In Haiti, new difficulties have a______ after the earthquake.